Sound production device and electronic device

Abstract

The application belongs to the technical field of acoustic devices, and discloses a sound generating device and electronic equipment. The sound generating device comprises a magnetic circuit system and a vibration system. The magnetic circuit system has a magnetic gap, and the magnetic circuit system is provided with a through hole. The vibration system comprises a diaphragm assembly, a voice coil and a first conductive piece. The diaphragm assembly is connected to the magnetic circuit system. One end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is located in the magnetic gap. The first conductive piece is of an elastic structure, one end of the first conductive piece is electrically connected to the voice coil, the other end of the first conductive piece extends towards the through hole, and the other end of the first conductive piece is insulatively connected to the magnetic circuit system. The sound generating device and the electronic equipment provided by the application have high connection reliability between the voice coil and an external power supply, and the risk of fracture is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acoustic devices, and in particular to a sound generating device and an electronic device. BACKGROUND

[0002] The sound generating device is a transducer device for converting an electrical signal into an acoustic signal, and is widely used in electronic devices such as mobile phones, computers, earphones, smart wearable devices, etc. With the miniaturization and light weight of electronic devices, there is a higher requirement for the size of the loudspeaker.

[0003] In related technologies, the loudspeaker includes an outer shell, a vibration system and a magnetic circuit system which are all arranged in the outer shell. The diaphragm of the vibration system is connected to the outer shell, the voice coil of the vibration system is located in the outer shell, and the magnetic circuit system is arranged in the outer shell, so that the vibration system and the magnetic circuit system are connected into a whole structure through the outer shell. Moreover, the magnetic circuit system has a magnetic gap, one end of the voice coil is located in the magnetic gap, and the magnetic circuit system and the voice coil cooperate with each other to drive the diaphragm to vibrate and generate sound. The voice coil is usually electrically connected to an external circuit through a wire, and when the voice coil vibrates, the wire will be pulled, thereby easily causing problems such as wire breakage or disconnection between the wire and the voice coil, and the reliability is low. SUMMARY

[0004] A first object of the present application is to provide a sound generating device with high connection reliability.

[0005] A second object of the present application is to provide an electronic device with high reliability.

[0006] The sound generating device comprises:

[0007] A magnetic circuit system, the magnetic circuit system having a magnetic gap, the magnetic circuit system being provided with a through hole;

[0008] A vibration system comprising a diaphragm assembly, a voice coil and a first conductive member; the diaphragm assembly is connected to the magnetic circuit system; one end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is located in the magnetic gap; the first conductive member is of an elastic structure, one end of the first conductive member is electrically connected to the voice coil, and the other end of the first conductive member extends towards the through hole and is insulatively connected to the magnetic circuit system.

[0009] In some embodiments, the through hole is located inside a region enclosed by a positive projection of the voice coil on the magnetic circuit system along a first direction, wherein the first direction is the thickness direction of the sound generating device.

[0010] In some embodiments, the magnetic circuit system comprises a first magnetic structure and a second magnetic structure connected, the first magnetic structure is annular, the second magnetic structure is arranged in the inner ring of the first magnetic structure, the through hole comprises a first through hole arranged in the second magnetic structure, the diaphragm assembly is connected to the first magnetic structure, and the voice coil is located between the first magnetic structure and the second magnetic structure.

[0011] In some embodiments, the vibration system further comprises a second conductive member; the second magnetic structure has a first surface facing the diaphragm assembly and a second surface arranged opposite to the first surface; the second conductive member passes through the first through hole, and one end of the second conductive member is arranged on the first surface and the other end of the second conductive member is arranged on the second surface; and the end of the first conductive member away from the voice coil is electrically connected to the second conductive member.

[0012] In some embodiments, the end of the first conductive member away from the voice coil is clamped and fixed between the second conductive member and the second magnetic structure.

[0013] In some embodiments, the magnetic circuit system further comprises a magnetic yoke, and the first magnetic structure and the second magnetic structure are connected through the magnetic yoke.

[0014] The magnetic yoke is provided with a relief hole, the first conductive member comprises a first connecting portion, a folded ring portion and a second connecting portion, the first connecting portion is connected to the voice coil, the second connecting portion is connected to the second magnetic structure, and the folded ring portion is arranged corresponding to the relief hole.

[0015] In some embodiments, the first magnetic structure is connected to the surface of the magnetic yoke facing the diaphragm assembly, at least part of the magnetic yoke is protruded towards the diaphragm assembly and forms a protruding portion, the surface of the protruding portion away from the diaphragm assembly is provided with a receiving groove, and at least part of the second magnetic structure is arranged in the receiving groove.

[0016] In some embodiments, the surface of the magnetic yoke facing the diaphragm assembly is provided with a first relief groove, and the orthographic projection of the voice coil on the magnetic yoke in a first direction is located in the first relief groove.

[0017] In some embodiments, the through hole further comprises a second through hole arranged in the magnetic yoke, and the first through hole and the second through hole are in communication with each other.

[0018] In some embodiments, the magnetic circuit system and the diaphragm assembly cooperatively enclose a sound cavity, the through hole is in communication with the sound cavity, and the sound generating device further comprises a damping mesh cloth connected to the magnetic yoke and covering the second through hole.

[0019] In some embodiments, the diaphragm assembly comprises a vibrating plate and a folded ring, an outer periphery of the folded ring is connected to the first magnetic structure, and an inner periphery of the folded ring is connected to the vibrating plate; an outer periphery of the vibrating plate is provided with a folded edge, the folded edge extends towards the magnetic gap, and the voice coil is connected to a side surface of the folded edge.

[0020] In some embodiments, the first conductive member comprises a vibrating portion and a conductive portion arranged on the vibrating portion, the vibrating portion is connected to the magnetic circuit system, and the conductive portion is electrically connected to the voice coil.

[0021] An electronic device comprising the sound generating apparatus as described above.

[0022] The application has the following beneficial effects:

[0023] The sound generating apparatus and the electronic device provided by the application have the following beneficial effects: the magnetic circuit system is provided with a through hole, the voice coil is electrically connected to an external power source through the first conductive member, the first conductive member is in an elastic structure, one end of the first conductive member is electrically connected to the voice coil, the other end of the first conductive member extends towards the through hole of the magnetic circuit system and is insulatively connected to the magnetic circuit system, the voice coil drives the first conductive member to elastically deform when the voice coil vibrates, thereby reducing the pulling force on the connection position between the first conductive member and the voice coil, and the risk of separation between the first conductive member and the voice coil is reduced, the end of the first conductive member away from the voice coil is fixedly arranged on the magnetic circuit system, so that the end of the first conductive member connected to the external power source will not move greatly, thereby reducing the risk of separation between the first conductive member and the external power source, and the reliability, connection strength and stability of the electrical connection are improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed in the description of the embodiments of the application. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art according to the contents of the embodiments of the application and the drawings without creative labor.

[0025] Figure 1 is a first structural schematic diagram of the sound generating apparatus provided by the embodiments of the application;

[0026] Figure 2 is a second structural schematic diagram of the sound generating apparatus provided by the embodiments of the application;

[0027] Figure 3 is an exploded view of the sound generating apparatus provided by the embodiments of the application;

[0028] Figure 4 is a top view of the sound generating apparatus provided by the embodiments of the application;

[0029] Figure 5 is a first cross-sectional view of the sound production device shown in the present application Figure 4 ;

[0030] Figure 6 is a second cross-sectional view of the sound production device shown in the present application Figure 4 ;

[0031] Figure 7 is a first structural schematic view of a magnetic yoke provided by an embodiment of the present application;

[0032] Figure 8 is a second structural schematic view of a magnetic yoke provided by an embodiment of the present application;

[0033] Figure 9 is a structural schematic view of a first conductive member provided by an embodiment of the present application;

[0034] Figure 10 is an exploded view of the first conductive member provided by an embodiment of the present application;

[0035] Figure 11 is a structural schematic view of a first magnetic pole piece provided by an embodiment of the present application;

[0036] Figure 12 is a structural schematic view of a sound production device with a third magnetic structure provided by an embodiment of the present application;

[0037] Figure 13 is a first cross-sectional view of the sound production device shown in the present application Figure 12 ;

[0038] Figure 14 is a second cross-sectional view of the sound production device shown in the present application Figure 12 .

[0039] Legend of reference signs:

[0040] 1, magnetic circuit system; 11, magnetic gap; 12, first magnetic structure; 121, first intermediate region; 122, second avoiding groove; 123, first magnetic pole piece; 124, first magnet; 13, second magnetic structure; 131, first through hole; 132, first face; 133, second face; 14, magnetic yoke; 141, protruding portion; 1411, accommodating groove; 142, first avoiding groove; 143, second through hole; 144, sunk groove; 145, avoiding hole; 15, third magnetic structure; 151, second intermediate region; 152, second magnet; 153, second magnetic pole piece; 16, through hole; 17, sound cavity;

[0041] 2, vibration system; 21, diaphragm assembly; 211, folded ring; 2111, corner portion; 212, vibrating plate; 2121, folded edge; 22, voice coil; 23, first conductive member; 231, first connecting portion; 232, folded ring portion; 233, second connecting portion; 234, vibrating portion; 235, conductive portion; 24, second conductive member;

[0042] 3, damping mesh;

[0043] X, first direction. DETAILED DESCRIPTION

[0044] To make the technical problems solved by the present application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the present application will be further described below in conjunction with the accompanying drawings and through specific embodiments. It can be understood that the specific embodiments described here are only used to explain the present application, but not limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all.

[0045] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily mean in the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0046] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0047] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood in a broad sense, for example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the present application, unless specifically stated and limited otherwise, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature. In the description of the present embodiment, if not specifically stated, "a plurality of" specifically refers to two or more than two.

[0049] In the description of the present embodiment, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0050] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a mediating element.

[0051] The technical solutions of the present application will be further illustrated below by specific embodiments in conjunction with the drawings.

[0052] The present embodiment provides a sound generating device with high connection reliability.

[0053] Exemplarily, as shown in Figures 1 to 10 The sound generating device includes a magnetic circuit system 1 and a vibration system 2. Optionally, the magnetic circuit system 1 in the present embodiment serves as a support component of the entire sound generating device to support the vibration system 2.

[0054] In the present embodiment, as shown in Figure 5 or Figure 6As shown, the magnetic circuit system 1 has a magnetic gap 11. Moreover, the magnetic circuit system 1 is provided with a through hole 16, which is arranged through the magnetic circuit system 1 along a first direction X. The first direction X is the thickness direction or height direction of the sound production device. The through hole 16 of the magnetic circuit system 1 can be used to provide space for the installation of other structures, thereby making full use of the middle region of the magnetic system and improving the compactness of the sound production device.

[0055] Exemplarily, as shown in the figure, Figure 3 As shown, the vibration system 2 includes a diaphragm assembly 21, a voice coil 22, and a first conductive member 23. The diaphragm assembly 21 is connected to the magnetic circuit system 1 to be fixedly supported by the magnetic circuit system 1. Alternatively, the outer periphery of the diaphragm assembly 21 is fixedly connected to the magnetic circuit system 1. One end of the voice coil 22 is connected to the diaphragm assembly 21, and the other end of the voice coil 22 is located in the magnetic gap 11. The voice coil 22 is electrically connected to an external power source, and the voice coil 22 is energized to cooperate with the magnetic circuit system 1 to drive the diaphragm assembly 21 to vibrate and produce sound.

[0056] The first conductive member 23 in this embodiment is of an elastic structure, and the first conductive member 23 can be elastically deformed to cooperate with the movement of the voice coil 22. One end of the first conductive member 23 is electrically connected to the voice coil 22, and the other end of the first conductive member 23 is electrically connected to an external power source. The external power source inputs current to the voice coil 22 through the first conductive member 23. In this embodiment, the end of the first conductive member 23 away from the voice coil 22 extends towards the through hole 16 of the magnetic circuit system 1 and is connected to the magnetic circuit system 1. That is, the end of the first conductive member 23 away from the voice coil 22 is fixedly arranged on the magnetic circuit system 1 and is arranged close to the through hole 16. It should be noted that the connection between the first conductive member 23 and the magnetic circuit system 1 is a non-electric connection.

[0057] The sound production device provided in this embodiment is provided with the through hole 16 of the magnetic circuit system 1, the voice coil 22 is electrically connected to the external power source through the first conductive member 23, and the first conductive member 23 is of an elastic structure. One end of the first conductive member 23 is electrically connected to the voice coil 22, and the other end of the first conductive member 23 extends towards the through hole 16 of the magnetic circuit system 1 and is insulatively connected to the magnetic circuit system 1. When the voice coil 22 vibrates, the first conductive member 23 is elastically deformed, thereby reducing the pulling force on the connection position of the first conductive member 23 and the voice coil 22, and thereby reducing the risk of separation of the first conductive member 23 and the voice coil 22. The end of the first conductive member 23 away from the voice coil 22 is fixedly arranged on the magnetic circuit system 1, so that the end of the first conductive member 23 connected to the external power source will not move greatly, thereby reducing the risk of separation of the first conductive member 23 and the external power source, and thereby improving the reliability, connection strength, and stability of the electrical connection.

[0058] In some optional embodiments, the through hole 16 is located inside an area enclosed by a positive projection of the voice coil 22 on the magnetic circuit system 1 in a first direction X, where the first direction X is the thickness direction of the sound production device. By setting the end of the first conductive member 23 away from the voice coil 22 to extend towards the through hole 16, the space at the through hole 16 can be fully utilized. Since the through hole 16 is located inside the positive projection of the voice coil 22 on the magnetic circuit system 1 in the first direction X, the first conductive member 23 extends from the voice coil 22 to the inside of the magnetic circuit system 1. The structure in which the voice coil 22 is connected to the external power supply extends inward and is close to the middle part of the magnetic circuit system 1. Compared with the outward extension mode, the space required for the sound production device in the transverse direction can be reduced, and the miniaturization of the sound production device can be achieved.

[0059] As shown in Figure 3 , the first conductive member 23 can be in a sheet shape. Of course, it can be understood that the first conductive member 23 can also be in a strip shape, and the present embodiment is not limited thereto.

[0060] The shape of the first conductive member 23 can be set according to requirements. In one embodiment, as shown in Figure 3 or Figure 5 , at least part of the first conductive member 23 is in an arc shape, and the first conductive member 23 is convexly arranged towards the diaphragm assembly 21 to fully utilize the space enclosed by the voice coil 22.

[0061] In other implementable manners, the first conductive member 23 can also be in a curved shape, and the present embodiment is not limited thereto.

[0062] In at least one embodiment, the first conductive member 23 can be in an integrated structure, and can also be in a split structure, and the present embodiment is not limited thereto. As shown in Figure 10 , the first conductive member 23 can include a vibration part 234 and a conductive part 235 arranged on the vibration part 234, that is, the vibration part 234 and the conductive part 235 are arranged in a stack. The vibration part 234 is used to provide elastic deformation of the first conductive member 23 and is used to connect with the magnetic circuit system 1. The conductive part 235 is used to realize electrical connection with the voice coil 22.

[0063] Optionally, the material of the vibration part 234 can be a high ductility material such as rubber or silicone. The conductive part 235 can include nano-conductive silver wire, conductive coating or other conductive structure, and the present embodiment is not limited thereto. The structure of the first conductive member 23 provided by the present embodiment is relatively simple, and the arrangement of the first conductive member 23 does not interfere with the voice coil 22 located in the magnetic gap 11, so that the voice coil 22 can be located in the magnetic gap 11 on the entire annular surface, thereby enhancing the BL value of the sound production device, and reducing the risk of wire breakage.

[0064] In some optional embodiments, as shown in Figure 3As shown, the magnetic circuit system 1 comprises the first magnetic structure 12 and the second magnetic structure 13 connected with each other, so that the first magnetic structure 12 and the second magnetic structure 13 are connected as a whole. In an embodiment, the first magnetic structure 12 and the second magnetic structure 13 can be directly connected, or indirectly connected through other components, which is not limited in the present embodiment.

[0065] The first magnetic structure 12 in the present embodiment is annular, and as shown, Figure 3 The first magnetic structure 12 encloses to form a first intermediate area 121. In an embodiment, at least part of the second magnetic structure 13 is arranged in the inner ring of the first magnetic structure 12 (i.e. the first intermediate area 121) to make full use of the inner ring space of the first magnetic structure 12. The diaphragm assembly 21 is connected to the first magnetic structure 12, and the voice coil 22 is located between the first magnetic structure 12 and the second magnetic structure 13.

[0066] As can be seen, the sound generating device provided in the present embodiment does not need to additionally provide a shell, and the magnetic circuit system 1 acts as a support component of the sound generating device to realize the fixation and support of the vibration system 2. When the sound generating device is installed in an electronic device, the first magnetic structure 12 can be fixedly connected with the electronic device, thereby realizing the connection of the entire sound generating device with the electronic device.

[0067] The sound generating device provided in the present embodiment, the magnetic circuit system 1 comprises the first magnetic structure 12 and the second magnetic structure 13 connected with each other, the first magnetic structure 12 is annular, and the outer periphery of the diaphragm assembly 21 of the vibration system 2 is connected to the first magnetic structure 12, so that the first magnetic structure 12 can be used to support the diaphragm assembly 21, and the intermediate area of the first magnetic structure 12 can provide a moving space for the vibration of the diaphragm assembly 21. The entire sound generating device is supported by the magnetic circuit system 1, and the design of the shell is cancelled, so that the volume of the sound generating device can be reduced, especially the cross-sectional area of the sound generating device can be reduced, which is beneficial to the miniaturization and thinning of the sound generating device. On the basis of the unchanged volume of the sound generating device, the volume of the magnetic circuit system 1 can be designed to be larger, thereby being beneficial to improving the acoustic performance of the sound generating device.

[0068] In some optional embodiments, the first magnetic structure 12 and the second magnetic structure 13 are arranged in a spaced manner and can form a magnetic gap 11. It should be noted that the second magnetic structure 13 is arranged on the inner side of the first magnetic structure 12 and is arranged in a spaced manner with the first magnetic structure 12.

[0069] In an embodiment, the first magnetic structure 12 and the second magnetic structure 13 can be in a directly opposite relationship. In other embodiments, the first magnetic structure 12 and the second magnetic structure 13 can also be in an obliquely opposite relationship, which is not limited in the present embodiment.

[0070] In at least one embodiment, the first magnetic structure 12 and the second magnetic structure 13 can be connected through the magnetic yoke 14, that is, the magnetic circuit system 1 further comprises the magnetic yoke 14, and the first magnetic structure 12 and the second magnetic structure 13 are both connected to the magnetic yoke 14. By arranging the magnetic yoke 14, the arrangement positions of the first magnetic structure 12 and the second magnetic structure 13 can be more flexible.

[0071] In at least one embodiment, as shown in Figure 5 and Figure 6 , the first magnetic structure 12 is connected to the surface of the magnetic yoke 14 facing the diaphragm assembly 21, and the second magnetic structure 13 is connected to the surface of the magnetic yoke 14 away from the diaphragm assembly 21, that is, the first magnetic structure 12 and the second magnetic structure 13 are oppositely arranged on the two surfaces of the magnetic yoke 14, that is, the magnetic yoke 14 is arranged between the first magnetic structure 12 and the second magnetic structure 13, and more parts of the magnetic yoke 14 are located in the magnetic gap 11, so that the first magnetic structure 12 and the second magnetic structure 13 can share one magnetic yoke 14, and the magnetic field lines generated by the first magnetic structure 12 and the second magnetic structure 13 can be better guided and concentrated into the magnetic gap 11, effectively increasing the magnetic field strength in the magnetic gap 11.

[0072] It should be noted that the first conductive part 23 includes the vibration part 234 and the conductive part 235, which are divided from the thickness direction of the first conductive part 23; and the first conductive part 23 includes the first connecting part 231, the folded ring part 232 and the second connecting part 233, which are divided from the length direction of the first conductive part 23, and the two division manners are not contradictory. For example, the first connecting part 231, the folded ring part 232 and the second connecting part 233 can all include the conductive part 235 and the vibration part 234, which are not limited in the embodiment.

[0073] In one embodiment, as shown in Figure 5 and Figure 6 , the first magnetic structure 12 and the second magnetic structure 13 are arranged on the two sides of the magnetic yoke 14 in the thickness direction, so that the connection area of the first magnetic structure 12 and the magnetic yoke 14 can be increased, the connection area of the second magnetic structure 13 and the magnetic yoke 14 can be increased, and the connection strength of the first magnetic structure 12 and the second magnetic structure 13 and the magnetic yoke 14 can be improved.

[0074] Optionally, as shown in Figure 5 and Figure 6 , the magnetic yoke 14 and the diaphragm assembly 21 are arranged in the first direction X. The first direction X is the vibration direction of the diaphragm assembly 21. In some optional embodiments, the diaphragm assembly 21 is connected to one end of the first magnetic structure 12 in the first direction X, and the magnetic yoke 14 is connected to the other end of the first magnetic structure 12 in the first direction X, so as to avoid the problem of interference between the diaphragm assembly 21 and the magnetic yoke 14.

[0075] Exemplarily, as shown in Figure 7 at least part of the magnetic yoke 14 is protruded towards the diaphragm assembly 21 and forms a protruding portion 141, as shown in Figure 8 a receiving groove 1411 is arranged on the surface of the protruding portion 141 away from the diaphragm assembly 21, and at least part of the second magnetic structure 13 is arranged in the receiving groove 1411. In this embodiment, the middle part of the magnetic yoke 14 is protruded towards the diaphragm assembly 21 and forms the protruding portion 141, and the first magnetic structure 12 is connected to the edge part of the magnetic yoke 14. By arranging the protruding portion 141 to be protruded towards the diaphragm assembly 21, arranging the receiving groove 1411 on the surface of the protruding portion 141 away from the diaphragm assembly 21, making the whole magnetic yoke 14 recessed towards the diaphragm assembly 21, forming the receiving groove 1411 in the inner ring of the first magnetic structure 12 to accommodate the second magnetic structure 13, and making full use of the middle area of the first magnetic structure 12, the thickness of the whole loudspeaker is reduced.

[0076] In one embodiment, as shown in Figure 8 part of the second magnetic structure 13 is located in the receiving groove 1411, and the other part is located outside the receiving groove 1411; or all of the second magnetic structure 13 is located in the receiving groove 1411. In this way, on the one hand, the connection strength between the second magnetic structure 13 and the magnetic yoke 14 is improved; on the other hand, the whole structure after the connection of the second magnetic structure 13 and the magnetic yoke 14 is more regular, so that the appearance of the sound generating device is more regular, and the assembly of the sound generating device is facilitated.

[0077] It should be noted that the receiving groove 1411 cooperates with the second magnetic structure 13, and the second magnetic structure 13 can be fixed to the groove wall of the receiving groove 1411 by bonding or the like to realize the connection with the magnetic yoke 14.

[0078] In one embodiment, as shown in Figure 5 or Figure 6 the receiving groove 1411 is arranged on the surface of the protruding portion 141 away from the diaphragm assembly 21. By arranging the receiving groove 1411 on the surface of the protruding portion 141 away from the diaphragm assembly 21, on the one hand, when the receiving groove 1411 is formed, the plate material used to manufacture the magnetic yoke 14 can be stamped to form the protruding portion 141 and the receiving groove 1411 at the same time, that is, the protruding portion 141 can be obtained by stamping forming, which facilitates the processing and manufacturing of the receiving groove 1411 and the protruding portion 141; on the other hand, it is convenient for the second magnetic structure 13 to be installed in the receiving groove 1411, and the assembly is facilitated.

[0079] In at least one embodiment, the arrangement position of the protruding portion 141 does not affect the vibration of the voice coil 22. For example, as shown in Figure 6As shown, the protruding portion 141 is located inside the area enclosed by the orthographic projection of the voice coil 22 on the magnetic yoke 14 along the first direction X, that is, along the first direction X, the orthographic projection of the voice coil 22 on the magnetic yoke 14 does not overlap with the protruding portion 141. In this way, the voice coil 22 does not touch the protruding portion 141 when vibrating, improving the reliability of the structure, and also allowing the protruding portion 141 to make full use of the space enclosed by the voice coil 22, making the overall structure of the sound production device more compact.

[0080] In at least one embodiment, please continue to refer to Figure 7 The surface of the magnetic yoke 14 facing the diaphragm assembly 21 is provided with a first avoiding groove 142 for avoiding the voice coil 22, so that the magnetic yoke 14 does not interfere with the vibration of the voice coil 22. For example, the orthographic projection of the voice coil 22 on the magnetic yoke 14 along the first direction X is entirely located in the first avoiding groove 142, that is, the voice coil 22 is arranged opposite to the first avoiding groove 142 along the first direction X. By providing the first avoiding groove 142, the part of the magnetic yoke 14 opposite to the voice coil 22 can be protruding, such as the protruding portion 141 described above, and thus the first intermediate region 121 of the first magnetic structure 12 can be fully utilized, which is beneficial to the miniaturization and thinning of the sound production device.

[0081] In this embodiment, the first avoiding groove 142 is annular, and the width of the first avoiding groove 142 is greater than the thickness of the voice coil 22.

[0082] In some optional embodiments, the second magnetic structure 13 is annular, so that the first through hole 131 is formed on the second magnetic structure 13. Since the second magnetic structure 13 is the outermost structure, the intermediate region of the second magnetic structure 13 can be used as a receiving groove to accommodate other related components, further improving the space utilization.

[0083] In some optional embodiments, the magnetic circuit system 1 cooperates with the diaphragm assembly 21 to enclose a sound cavity 17, and the through hole 16 is arranged in communication with the sound cavity 17, so that the sound cavity 17 communicates with the outside through the through hole 16. When the diaphragm assembly 21 vibrates, it can push or pull the air in the sound cavity 17.

[0084] In this embodiment, when the magnetic circuit system 1 includes the first magnetic structure 12, the second magnetic structure 13 and the magnetic yoke 14, Figure 5 and Figure 6 As shown, the first magnetic structure 12, the magnetic yoke 14 and the diaphragm assembly 21 cooperatively enclose the sound cavity 17. Moreover, the second magnetic structure 13 is provided with the first through hole 131, the magnetic yoke 14 is provided with the second through hole 143, and the first through hole 131 and the second through hole 143 are in communication and form the through hole 16, that is, the through hole 16 includes the second through hole 143 arranged on the magnetic yoke 14, and the first through hole 131 and the second through hole 143 are in communication.

[0085] In some optional embodiments, as shown in Figure 5 In the embodiment, the other end of the first conductive member 23 is fixedly connected with the magnetic yoke 14 and / or the second magnetic structure 13. By arranging the first conductive member 23, the electric contact part of the sound production device for connecting the external power supply is arranged close to the through hole 16 of the magnetic circuit system 1, instead of extending towards the outer edge of the magnetic circuit system 1, so that a hole for the power supply connecting part to pass through does not need to be arranged on the first magnetic structure 12, thereby not affecting the volume and magnetism of the first magnetic structure 12. In addition, the magnetic circuit system 1 is provided with the through hole 16, so that the part of the sound production device for electrically connecting with the electronic device can be accommodated in the through hole 16, without occupying external mounting space, further reducing the mounting space required by the sound production device.

[0086] In at least one embodiment, the vibration system 2 further comprises a second conductive member 24, which is used to be electrically connected with the first conductive member 23, so as to be able to serve as an extension structure of the first conductive member 23, further facilitating the electrical connection with the external power supply. In the embodiment, the second conductive member 24 is fixedly arranged on the second magnetic structure 13.

[0087] In one of the embodiments, as shown in Figure 5 The second magnetic structure 13 has a first face 132 facing the diaphragm assembly 21 and a second face 133 arranged opposite to the first face 132, and the first face 132 and the second face 133 are arranged opposite in the first direction X. One end of the second conductive member 24 is arranged on the first face 132, the other end of the second conductive member 24 is arranged on the second face 133, and the second conductive member 24 passes through the first through hole 131 of the second magnetic structure 13. The end of the first conductive member 23 away from the voice coil 22 is electrically connected with the end of the second conductive member 24 arranged on the first face 132, and the end of the second conductive member 24 arranged on the second face 133 is used to be electrically connected with the external power supply.

[0088] It should be noted that the second face 133 of the second magnetic structure 13 is the outer surface of the entire sound production device, so that the second conductive member 24 arranged on the second face 133 can facilitate the electrical connection with the external power supply, reducing the difficulty of electrical connection. In addition, the second conductive member 24 has a large connection area with the second magnetic structure 13, reducing the risk of separation of the second conductive member 24 from the second magnetic structure 13.

[0089] In some optional embodiments, the second conductive member 24 is in a U shape, and the middle part of the second conductive member 24 is fixedly connected with the hole wall of the first through hole 131, further improving the connection strength of the second conductive member 24 with the second magnetic structure 13.

[0090] Optionally, the second conductive member 24 can be a flexible circuit board or other conductive structure, which is not limited in the embodiment.

[0091] By setting the first conductive member 23 and the second conductive member 24, and the cooperation between the second conductive member 24 and the second magnetic structure 13, the voice coil 22 can be electrically connected with the external power source, the complexity of the connection structure between the voice coil 22 and the external power source is simplified, the strength and reliability of the connection between the voice coil 22 and the external power source are improved, and the space in the transverse direction of the sound production device is not occupied, which is beneficial to the miniaturization of the sound production device.

[0092] In some optional embodiments, referring to Figure 5 , the end of the first conductive member 23 away from the voice coil 22 is clamped and fixed between the second conductive member 24 and the second magnetic structure 13, so as to reduce the risk of disconnection between the first conductive member 23 and the second conductive member 24 due to vibration, and improve the reliability of the electrical connection. It should be noted that when the first conductive member 23 includes the vibration part 234 and the conductive part 235, the vibration part 234 is in contact with the second magnetic structure 13, and the conductive part 235 is electrically connected with the second conductive member 24, so as to form a double fixation for the first conductive member 23.

[0093] In the embodiment, the first conductive member 23 is arranged on the second magnetic structure 13, and the second magnetic structure 13 is arranged on the side of the magnetic yoke 14 away from the diaphragm assembly 21, and the voice coil 22 is located on the side of the magnetic yoke 14 facing the diaphragm assembly 21. Therefore, in order to avoid the magnetic yoke 14 interfering with the first conductive member 23, as shown in Figure 7 and Figure 8 , the magnetic yoke 14 is provided with a relief hole 145 for avoiding the first conductive member 23, that is, the first conductive member 23 is arranged in the relief hole 145, so that the first conductive member 23 can be smoothly electrically connected with the voice coil 22 and the second conductive member 24.

[0094] It should be noted that the shape and size of the relief hole 145 can be set according to the shape and size of the first conductive member 23, and the embodiment is not limited in this regard.

[0095] In at least one embodiment, as shown in Figure 9As shown, the first conductive member 23 comprises a first connecting portion 231, a folded ring portion 232 and a second connecting portion 233. The first connecting portion 231, the folded ring portion 232 and the second connecting portion 233 are sequentially connected. The first connecting portion 231 is connected to the voice coil 22, that is, the first connecting portion 231 is electrically connected to the voice coil 22. The second connecting portion 233 is connected to the second magnetic structure 13. The folded ring portion 232 is arranged corresponding to the avoiding hole 145, that is, the folded ring portion 232 is arranged through the avoiding hole 145. By arranging the first connecting portion 231, the connection between the first conductive member 23 and the voice coil 22 can be facilitated, and the connection strength between the first conductive member 23 and the voice coil 22 can be improved. By arranging the second connecting portion 233, the first conductive member 23 and the second magnetic structure 13 have a larger connection area, and thus have higher connection reliability. By arranging the folded ring portion 232, the first conductive member 23 can have a larger stretching range in the length direction and the height direction, and thus the first conductive member 23 has a larger elastic deformation range. When the first connecting portion 231 vibrates along the first direction with the voice coil 22, the pulling force applied to the second connecting portion 233 can be very small, and the external force received between the first connecting portion 231 and the voice coil 22 is also very small, and thus the connection firmness and reliability of the first conductive member 23 are improved.

[0096] In some optional embodiments, the shape of the folded ring portion 232 can be the same as the shape of the folded ring 211 of the diaphragm assembly 21, for example, the folded ring portion 232 can be in a circular arc shape.

[0097] Optionally, the avoiding hole 145 can be in communication with the second through hole 143 of the magnetic yoke 14 or not in communication, which is not limited in the embodiment.

[0098] In at least one implementation, two first conductive members 23 are arranged, one of the two first conductive members 23 is electrically connected to the output end of the voice coil 22, and the other is electrically connected to the output end of the voice coil 22. The two first conductive members 23 can be oppositely arranged or adjacently arranged, which is not limited in the embodiment.

[0099] Optionally, as shown, Figure 3 corresponding to the two first conductive members 23, the avoiding hole 145 is also provided with two avoiding holes. In some embodiments, one of the two avoiding holes 145 is in communication with the second through hole 143, and the other avoiding hole 145 is not in communication with the second through hole 143.

[0100] In at least one implementation, as Figure 3As shown, the sound production device further comprises a damping mesh cloth 3 connected to the magnetic yoke 14 and covering the second through hole 143 on the magnetic yoke 14. The damping mesh cloth 3 is used to increase the damping, i.e. the acoustic resistance, in the sound cavity 17. When the structure of the sound cavity 17 is fixed, the frequency response curve can be flattened by adjusting the acoustic resistance of the damping mesh cloth 3, thereby improving the acoustic performance of the sound production device. As can be seen, the damping mesh cloth 3 can have the functions of dust prevention and damping improvement. In addition, the damping mesh cloth 3 can generally make the frequency response curve smoother. Specifically, the damping mesh cloth 3 can locally suppress the amplitude near the resonance frequency point, making the frequency response curve more flat, and thus making the corresponding total harmonic distortion (THD) lower.

[0101] Optionally, the damping mesh cloth 3 can also be made of other porous materials, such as non-woven fabric, polyvinyl chloride (PVC), or metal materials, etc. The present embodiment is not limited in this regard.

[0102] In some optional embodiments, as shown in Figure 7 The magnetic yoke 14 is provided with a sink 144, and the damping mesh cloth 3 is arranged in the sink 144 and connected to the magnetic yoke 14. By providing the sink 144, the damping mesh cloth 3 does not occupy the space on one side of the magnetic yoke 14, but fully utilizes the space on the magnetic yoke 14, further improves the space utilization, and also reduces the risk of interference between the damping mesh cloth 3 and other structures.

[0103] In one embodiment, the thickness of the damping mesh cloth 3 is less than the depth of the sink 144, so that the damping mesh cloth 3 is completely in the sink 144, protected by the sink 144, and the risk of falling due to contact with other structures is reduced. In other embodiments, the thickness of the damping mesh cloth 3 can also be equal to the depth of the sink 144. Of course, it can be understood that the thickness of the damping mesh cloth 3 can also be greater than the depth of the sink 144, and the present embodiment is not limited in this regard.

[0104] It should be noted that the damping mesh cloth 3 is arranged on the side of the magnetic yoke 14 facing the diaphragm assembly 21, i.e. the damping mesh cloth 3 and the second magnetic structure 13 are arranged on both sides of the magnetic yoke 14 to avoid interference between them, thereby ensuring the connection strength of the damping mesh cloth 3 and the second magnetic structure 13 with the magnetic yoke 14.

[0105] In one embodiment, as shown in Figure 3 , Figure 5 and Figure 11As shown, the surface of the first magnetic structure 12 connected with the diaphragm assembly 21 is provided with a second avoiding groove 122. The diaphragm assembly 21 comprises a folded ring 211, and the second avoiding groove 122 is arranged opposite to a corner portion 2111 of the folded ring 211, and the second avoiding groove 122 is used for avoiding the diaphragm assembly 21. Exemplarily, the folded ring 211 of the diaphragm assembly 21 has a corner portion 2111 close to the outer periphery, and when the folded ring 211 vibrates, the corner portion 2111 will not collide with the first magnetic structure 12, thereby ensuring that the vibration amplitude of the folded ring 211 is not interfered by the first magnetic structure 12, and the vibration reliability of the sound generating device is improved.

[0106] It should be noted that, as Figure 5 shown, the folded ring 211 has an arc-shaped protrusion between two flat portions, and the corner portion 2111 of the folded ring 211 refers to a portion close to the outer periphery and bent, that is, a position where the arc-shaped protrusion portion intersects with the flat portion on the outside.

[0107] It should also be noted that the corner portion 2111 of the folded ring 211 is arranged opposite to the second avoiding groove 122, specifically, along the first direction X, the orthographic projection of the corner portion 2111 of the folded ring 211 on the first magnetic structure 12 can be located in the second avoiding groove 122.

[0108] In this embodiment, one surface of the first magnetic structure 12 in the first direction X is connected to the folded ring 211, and the other surface is connected to the magnetic yoke 14.

[0109] In at least one embodiment, as Figure 3 shown, the first magnetic structure 12 comprises a first magnetic pole piece 123 and a first magnet 124. The first magnetic pole piece 123 and the first magnet 124 are arranged in a stack along the first direction X. The folded ring 211 of the diaphragm assembly 21 is connected to the first magnetic pole piece 123, and the second avoiding groove 122 is arranged on the surface of the first magnetic pole piece 123 away from the first magnet 124. The first magnet 124 is connected to the magnetic yoke 14. The first magnet 124 in this embodiment cooperates with the second magnetic structure 13 to form the magnetic gap 11, and the first magnetic pole piece 123 can be used to correct the magnetic force lines of the first magnet 124, so that more magnetic force lines can pass through the voice coil 22, thereby enhancing the induction strength of the voice coil 22 and improving the acoustic performance of the sound generating device. Of course, it can be understood that the material of the magnetic yoke 14 is a magnetic material, which can also play a role in correcting the magnetic force lines, and this embodiment will not be described in detail.

[0110] It should be noted that when the first magnetic structure 12 comprises the first magnetic pole piece 123 and the first magnet 124, as Figure 3 shown, the first magnetic pole piece 123 and the first magnet 124 are both annular, and as Figure 3As shown, the center region of the first magnetic pole piece 123 and the center region of the first magnet 124 cooperate to form a first intermediate region 121.

[0111] In one embodiment, the magnetism of the first magnet 124 towards the magnetic pole on one side of the diaphragm assembly 21 is opposite to the magnetism of the second magnetic structure 13 towards the magnetic pole on one side of the diaphragm assembly 21, and the magnetism of the first magnet 124 away from the magnetic pole on one side of the diaphragm assembly 21 is opposite to the magnetism of the second magnetic structure 13 away from the magnetic pole on one side of the diaphragm assembly 21, so as to form a magnetic enhancement side towards the magnetic gap 11. For example, in the present embodiment, the magnetism of the first magnet 124 towards the magnetic pole on one side of the diaphragm assembly 21 and the magnetism of the second magnetic structure 13 away from the magnetic pole on one side of the diaphragm assembly 21 are both N poles.

[0112] Optionally, in the present embodiment, Figures 1 to 11 is a schematic view of the magnetic circuit system 1 only including the first magnetic structure 12 and the second magnetic structure 13.

[0113] In at least one implementation, as shown in Figures 12 to 14 The magnetic circuit system 1 includes the first magnetic structure 12, the second magnetic structure 13, and the third magnetic structure 15. The third magnetic structure 15 is connected to the first magnetic structure 12, so that the first magnetic structure 12, the second magnetic structure 13, and the third magnetic structure 15 can be connected to each other, improving the integrity of the magnetic circuit system 1.

[0114] In some embodiments, as shown in Figure 12 The third magnetic structure 15 is annular, so that the intermediate region (i.e., the second intermediate region 151) of the third magnetic structure 15 can be provided with other structures to improve space utilization.

[0115] Optionally, the third magnetic structure 15 is located on the same side of the first magnetic structure 12 as the diaphragm assembly 21, and the magnetism of the third magnetic structure 15 towards the magnetic pole on one side of the first magnetic structure 12 is the same as the magnetism of the first magnetic structure 12 towards the magnetic pole on one side of the third magnetic structure 15. In this way, the third magnetic structure 15 and the first magnetic structure 12 cooperate to improve the magnetic field strength of the magnetic gap 11, thereby improving the magnetic driving force on the voice coil 22 to achieve the purpose of improving the acoustic performance of the sound generating device. For example, the magnetism of the third magnetic structure 15 towards the magnetic pole on one side of the first magnetic structure 12 and the magnetism of the first magnetic structure 12 towards the magnetic pole on one side of the third magnetic structure 15 are both N poles.

[0116] In some optional embodiments, as shown in Figure 13 and Figure 14As shown, the wall width of the third magnetic structure 15 is smaller than that of the first magnetic structure 12, and the outer circumferential surface of the third magnetic structure 15 is flush with that of the first magnetic structure 12, that is, the length and width of the intermediate region (i.e., the second intermediate region 151) enclosed by the third magnetic structure 15 are both larger than those of the space enclosed by the first magnetic structure 12. In this way, the third magnetic structure 15 can provide a space for the vibration of the diaphragm assembly 21, so that the size of the diaphragm assembly 21 can be designed to be larger.

[0117] As shown in Figure 13 and Figure 14 , the third magnetic structure 15 includes a second magnet 152 and a second magnetic pole piece 153 which are arranged in the first direction X. The second magnet 152 is closer to the first magnetic structure 12 than the second magnetic pole piece 153.

[0118] In at least one embodiment, as shown in Figure 13 and Figure 14 , the diaphragm assembly 21 includes a folded ring 211, and the outer periphery of the folded ring 211 is clamped and fixed between the first magnetic structure 12 and the third magnetic structure 15. In this way, the fixing strength of the folded ring 211 and the first magnetic structure 12 and the third magnetic structure 15 can be improved, the risk of the folded ring 211 separating from the first magnetic structure 12 during vibration can be reduced, and the connection reliability can be improved. For example, the outer periphery of the folded ring 211 is clamped and fixed between the first magnetic pole piece 123 and the second magnet 152.

[0119] In this embodiment, the folded ring 211 is convex, and the folded ring 211 is convex in a direction away from the first magnetic structure 12. In this way, the first magnetic structure 12 and the second magnetic structure 13 can be closer, and the first magnetic structure 12 will not interfere with the vibration of the folded ring 211, ensuring the amplitude of the folded ring 211. The wall width of the third magnetic structure 15 is designed to be smaller to effectively avoid the vibration of the folded ring 211, so that the positional relationship and size relationship of the first magnetic structure 12, the second magnetic structure 13, the third magnetic structure 15 and the folded ring 211 are more reasonable and flexible. On the basis of fully utilizing the space, the amplitude of the diaphragm assembly 21 is not sacrificed, and thus the requirements of acoustic performance can be met on the basis of ensuring the miniaturization and thinness of the sound generating device.

[0120] Optionally, please continue to refer to Figure 13 and Figure 14When the third magnetic structure 15 is provided, the dimension of the folded ring 211 in the first direction X is less than or equal to the dimension of the third magnetic structure 15 in the first direction X; that is, the height of the folded ring 211 is less than or equal to the height of the third magnetic structure 15. With this configuration, the protrusion 141 of the folded ring 211 can be located within the space enclosed by the third magnetic structure 15, without protruding from the third magnetic structure 15. On the one hand, the third magnetic structure 15 can protect the folded ring 211, preventing it from being squeezed by other structures and ensuring effective vibration space for the folded ring 211; on the other hand, while increasing the magnetic field strength, the space enclosed by the third magnetic structure 15 is fully utilized, allowing the thickness or height of the sound-generating device to remain relatively small.

[0121] The diaphragm assembly 21 can have various specific structures. Exemplarily, this embodiment provides a diaphragm assembly 21, such as... Figure 3 As shown, the diaphragm assembly 21 includes a diaphragm plate 212 and a folded ring 211. The outer periphery of the folded ring 211 is fixedly connected to the first magnetic structure 12, and the inner periphery of the folded ring 211 is connected to the diaphragm plate 212. The diaphragm plate 212 is fixedly connected to one end of the voice coil 22.

[0122] In at least one possible implementation, such as Figure 3 or Figure 5 As shown, the outer periphery of the diaphragm 212 is provided with a folded edge 2121, which bends towards the voice coil 22. The voice coil 22 is connected to the side of the folded edge 2121, allowing the voice coil 22 and the diaphragm 212 to have a larger connection area, thereby effectively improving the connection strength between the voice coil 22 and the diaphragm 212. Furthermore, the rigidity of the edge of the diaphragm 212 is improved, further enhancing the structural reliability of the diaphragm 212. In addition, by providing the folded edge 2121, which is located on one side of the diaphragm 212 in the first direction X, the diaphragm 212 is extended in the first direction X, allowing a larger area of ​​the voice coil 22 of the same size to be placed in an area with a stronger magnetic field, thereby effectively improving the BL value of the sound-generating device.

[0123] The sound production device provided in the embodiment replaces the bracket part of the related art with the magnetic circuit system 1, simplifies the structure of the sound production device, and effectively compresses the height (or thickness) at the same time. The voice coil 22 is fixedly connected (for example, bonded) with the folded edge 2121 of the vibration plate 212, so that the voice coil 22 can be in the area with a stronger magnetic field intensity, and the BL value of the sound production device is enhanced. At the same time, the setting of the folded edge 2121 improves the edge rigidity of the vibration plate 212 and enhances the reliability. The first conductive part 23 in the embodiment is formed by setting the conductive part 235 on the vibration part 234, so that the structure is simplified, the voice coil 22 can be in the magnetic gap 11 on the entire annular ring, the BL value is further enhanced, and the risk of wire breakage is reduced. In addition, the first magnetic structure 12, the second magnetic structure 13 and the third magnetic structure 15 in the embodiment are all annular structures, and the magnetic yoke 14 is also annular, so that the magnetic circuit system 1 actually occupies a very thin height in the middle area, and can reserve space for other structure design.

[0124] The embodiment also provides an electronic device including the sound production device. The electronic device provided in the embodiment does not need to reserve a large mounting space for the sound production device, is beneficial to reasonable distribution of the internal space of the electronic device, is more flexible in the mounting position, and is beneficial to miniaturization of the electronic device.

[0125] Exemplarily, the electronic device can be a folding mobile phone, an ultra-thin television, a computer, a smart wearable device, and the like, and the embodiment is not limited thereto.

[0126] It should be noted that the above are only the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. Sound production device, characterized in that The application relates to a sound production device. The sound production device comprises a magnetic circuit system having a magnetic gap, a vibration system, and a first conductive piece. The vibration system comprises a diaphragm assembly, a voice coil, and the first conductive piece. One end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is located in the magnetic gap.

2. The sound production device of claim 1, wherein The first conductive piece is in elastic structure, one end of the first conductive piece is electrically connected to the voice coil, and the other end of the first conductive piece extends towards the through hole and is connected to the magnetic circuit system.

3. The sound production device of claim 2, wherein, The through hole is located in a region enclosed by a normal projection of the voice coil on the magnetic circuit system in a first direction.

4. The sound production device of claim 3, wherein, The magnetic circuit system comprises a first magnetic structure and a second magnetic structure connected to each other.

5. The sound production device of claim 4, wherein, The first magnetic structure is annular, and the second magnetic structure is at least partially arranged in an inner ring of the first magnetic structure.

6. Sound production device according to any of claims 3-5, characterized in that The through hole comprises a first through hole arranged in the second magnetic structure.

7. The sound production device of claim 6, wherein, The diaphragm assembly is connected to the first magnetic structure, and the voice coil is located between the first magnetic structure and the second magnetic structure.

8. The sound production device of claim 6, wherein, The vibration system further comprises a second conductive piece.

9. The sound production device of claim 6, wherein, The second magnetic structure has a first surface facing the diaphragm assembly and a second surface arranged opposite to the first surface.

10. The sound production device of claim 6, wherein, The second conductive piece is arranged in the first through hole, one end of the second conductive piece is arranged on the first surface, and the other end of the second conductive piece is arranged on the second surface.

11. The sound production device of claim 10, wherein, One end of the first conductive piece away from the voice coil is electrically connected to the second conductive piece. The other end of the first conductive piece away from the voice coil is clamped and fixed between the second conductive piece and the second magnetic structure. The magnetic circuit system further comprises a magnetic yoke. The first magnetic structure is connected to a surface of the magnetic yoke facing the diaphragm assembly. At least part of the magnetic yoke is protruded towards the diaphragm assembly and forms a protruding part. A surface of the protruding part away from the diaphragm assembly is provided with a receiving groove, and at least part of the second magnetic structure is arranged in the receiving groove. A surface of the magnetic yoke facing the diaphragm assembly is provided with a first avoiding groove. The normal projection of the voice coil on the magnetic yoke in the first direction is located in the first avoiding groove. The through hole further comprises a second through hole arranged in the magnetic yoke. The first through hole and the second through hole are in communication with each other. The magnetic circuit system and the diaphragm assembly cooperatively enclose a sound cavity, and the through hole is in communication with the sound cavity. The sound production device further comprises a damping mesh cloth connected to the magnetic yoke and covering the second through hole.

12. The sound production device of any one of claims 3-5, wherein, The diaphragm assembly comprises a vibrating plate and a folded ring, an outer periphery of the folded ring is connected to the first magnetic structure, and an inner periphery of the folded ring is connected to the vibrating plate; an outer periphery of the vibrating plate is provided with a folded edge, the folded edge extends towards the magnetic gap, and the voice coil is connected to a side surface of the folded edge.

13. The sound production device of any one of claims 1-5, wherein, The first conductive part comprises a vibrating part and a conductive part arranged on the vibrating part, the vibrating part is connected to the magnetic circuit system, and the conductive part is electrically connected to the voice coil.

14. An electronic device, characterized by The sound production device comprises a magnetic circuit system, a diaphragm assembly, a voice coil, a first conductive part, and a second conductive part. The diaphragm assembly comprises a vibrating plate and a folded ring, an outer periphery of the folded ring is connected to the first magnetic structure, and an inner periphery of the folded ring is connected to the vibrating plate; an outer periphery of the vibrating plate is provided with a folded edge, the folded edge extends towards the magnetic gap, and the voice coil is connected to a side surface of the folded edge. The first conductive part comprises a vibrating part and a conductive part arranged on the vibrating part, the vibrating part is connected to the magnetic circuit system, and the conductive part is electrically connected to the voice coil. The sound production device comprises a magnetic circuit system, a diaphragm assembly, a voice coil, a first conduct

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