Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, the sound production device comprises a magnetic circuit system and a vibration system, a central magnetic part of the magnetic circuit system comprises two central magnetic groups, and an edge magnetic part comprises an outer magnetic group located on the outer sides of the two central magnetic groups and a common magnetic group located between the two central magnetic groups. The outer magnetic group and the common magnetic group are spaced from each central magnetic group so as to define two magnetic gaps which are arranged at intervals, each central magnetic group comprises a first central magnet, a central magnetic conductive plate and a second central magnet which are arranged in a stacked mode, and the outer magnetic group and the common magnetic group each comprise a first edge magnet, an edge magnetic conductive plate and a second edge magnet which are arranged in a stacked mode. The vibration system comprises a vibrating diaphragm and two voice coils, and each voice coil corresponds to one magnetic gap. According to the sound production device, the utilization rate of the magnetic circuit system is further improved by optimizing the magnetic circuit system and adopting the double voice coils, so that the loudness and the sensitivity of the sound production device are improved.

Description

Technical Field

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

[0002] In recent years, convenient electronic devices (such as mobile phones, headphones, and computers) have become part of people's daily lives. With the rapid development of technology, the popularity of speakers is increasing. People's requirements for speakers are not limited to the playback of video and audio, but also have higher requirements for the sound quality and reliability of the sound played by the speakers. Speakers are directly related to the sound quality and product stability.

[0003] In the related technology, the micro speakers used in electronic devices such as tablets and laptops are usually large in size, and the existing large-size ultra-thin speakers usually adopt a single voice coil solution, which makes the magnetic energy utilization rate of the middle area of ​​the central magnet in the magnetic circuit system low and cannot be effectively utilized, thus affecting the loudness and sensitivity of the micro speakers. Summary of the invention

[0004] The main purpose of the present invention is to provide a sound-generating device and an electronic device, aiming to provide a sound-generating device that effectively utilizes a magnetic circuit system. The sound-generating device optimizes the magnetic circuit system and adopts a dual voice coil to further improve the utilization rate of the magnetic circuit system, thereby improving the loudness and sensitivity of the sound-generating device.

[0005] To achieve the above object, the present invention provides a sound-generating device, comprising:

[0006] A magnetic circuit system, the magnetic circuit system includes a magnetic yoke and a central magnetic portion and a side magnetic portion arranged on the magnetic yoke, the central magnetic portion includes two central magnetic groups arranged at intervals, the side magnetic portion includes an outer magnetic group located outside the two central magnetic groups and a common magnetic group located between the two central magnetic groups, the outer magnetic group and the common magnetic group are both spaced apart from each of the central magnetic groups to enclose and form two magnetic gaps arranged at intervals, each of the central magnetic groups includes a first central magnet, a central magnetic plate and a second central magnet arranged in a stacked manner, the outer magnetic group and the common magnetic group both include a first side magnet, a side magnetic plate and a second side magnet arranged in a stacked manner; and

[0007] A vibration system, the vibration system comprising a diaphragm and two voice coils connected to the diaphragm, each of the voice coils being arranged corresponding to one of the magnetic gaps;

[0008] The first central magnet, the central magnetic conductive plate and the second central magnet respectively correspond to the first side magnet, the side magnetic conductive plate and the second side magnet in a one-to-one manner in a vibration direction perpendicular to the vibration system.

[0009] In one embodiment, the first central magnet and the second central magnet are both magnetized along the vibration direction of the vibration system, and the magnetic poles of the first central magnet and the second central magnet close to the central magnetic conductive plate are the same;

[0010] The first side magnet and the second side magnet are both magnetized along the vibration direction of the vibration system, and the magnetic poles of the first side magnet and the second side magnet close to the side magnetic conductive plate are the same;

[0011] The magnetic poles of the first center magnet and the second center magnet close to the center magnetic conductive plate are opposite to the magnetic poles of the first side magnet and the second side magnet close to the side magnetic conductive plate.

[0012] In one embodiment, the diaphragm has two long axis sides and two short axis sides connected end to end, and the two central magnetic groups are arranged at intervals along the direction of the long axis sides.

[0013] In one embodiment, the sound-generating device further comprises a housing, the housing is provided with an installation cavity, and the magnetic circuit system and the vibration system are arranged in the installation cavity.

[0014] In one embodiment, the magnetically conductive yoke includes a first magnetic yoke and a second magnetic yoke arranged opposite to each other, the central magnetic portion and the side magnetic portion are both arranged between the first magnetic yoke and the second magnetic yoke, the first side magnet and the first center magnet are both connected to the first magnetic yoke, and the second side magnet and the second center magnet are connected to the second magnetic yoke.

[0015] In one embodiment, the housing further comprises a first through hole and a second through hole communicating with the mounting cavity, the first magnetic yoke is connected to the housing and located in the first through hole, and the second magnetic yoke is connected to the housing and located in the second through hole.

[0016] In one embodiment, the diaphragm has an inner ring hole, the magnetic circuit system is passed through the inner ring hole, the magnetic circuit system is provided with an avoidance gap connected to each of the magnetic gaps, and the vibration system also includes a skeleton, one end of the skeleton is connected to the diaphragm, and the other end of the skeleton passes through the avoidance gap and is connected to each of the voice coils.

[0017] In one embodiment, there are two skeletons, and the diaphragm has two long axis sides and two short axis sides connected end to end; the two skeletons are arranged at intervals along the short axis sides and are symmetrically arranged, and each skeleton is correspondingly connected to one end of the two voice coils.

[0018] In one embodiment, the skeleton includes a first connection portion, a plurality of connection arms and a plurality of second connection portions, the first connection portion is connected to the diaphragm, the plurality of connection arms and the plurality of second connection portions are all located on the inner side of the first connection portion, one end of the plurality of connection arms are all connected to the first connection portion and are arranged at intervals, and at least one second connection portion is connected to an end of the connection arm away from the first connection portion;

[0019] Wherein, a plurality of the connecting arms pass through the avoidance gap and extend into the magnetic gap, so that the second connecting portion is connected to the voice coil.

[0020] In one embodiment, the diaphragm includes an inner ring portion, a first folded ring arranged around the inner ring portion, a straight portion arranged around the first folded ring, a second folded ring arranged around the straight portion, and a fixed portion connected to the outer side of the second folded ring, the fixed portion is connected to the outer shell, the straight portion is connected to the frame, and the inner ring portion is formed with the inner ring hole.

[0021] In one embodiment, the inner ring portion, the first fold ring, the straight portion, the second fold ring and the fixing portion are an integrally formed structure;

[0022] And / or, the protruding direction of the first fold ring is the same as or opposite to the protruding direction of the second fold ring;

[0023] And / or, the diaphragm further includes a reinforcement portion, and the reinforcement portion is arranged between the straight portion and the frame.

[0024] In one embodiment, the housing is further provided with a support member, the support member is an annular structure, the support member surrounds the magnetic circuit system and is provided on a side of the diaphragm away from the frame, and the inner ring of the diaphragm is connected to the support member;

[0025] And / or, the arrangement direction of the two central magnetic groups is defined as a first direction, the outer magnetic group includes a first part arranged on both sides of the two central magnetic groups along the first direction and a second part arranged on both sides of the two central magnetic groups along a direction perpendicular to the first direction, and the avoidance gap is formed between the first part and the second part and between the second part and the common magnetic group.

[0026] The present invention further provides an electronic device, which includes the sound-generating device described above.

[0027] The sound-generating device of the technical solution of the present invention sets the magnetic circuit system as a magnetic yoke and a central magnetic part and a side magnetic part arranged on the magnetic yoke, and sets the central magnetic part as two central magnetic groups set at intervals, and sets the side magnetic parts as an outer magnetic group located outside the two central magnetic groups and a common magnetic group located between the two central magnetic groups, so that the outer magnetic group and the common magnetic group of the side magnetic parts are spaced apart from each central magnetic group to enclose and form two magnetic gaps set at intervals, and the two voice coils of the vibration system are respectively set corresponding to the two magnetic gaps, so that current is passed through the two voice coils, so that the two voice coils vibrate respectively in the magnetic fields of the two magnetic gaps formed by the magnetic circuit system and drive the diaphragm to vibrate and produce sound; at the same time, by setting each central magnetic group as a layer The first central magnet, the central magnetic plate and the second central magnet are stacked, and the outer magnetic group and the common magnetic group are both stacked as the first side magnet, the side magnetic plate and the second side magnet, so that the first central magnet, the central magnetic plate and the second central magnet of the two central magnetic groups correspond one by one with the first side magnet, the side magnetic plate and the second side magnet of the outer magnetic group and the common magnetic group of the side magnetic part respectively in a vibration direction perpendicular to the vibration system. In this way, the two central magnetic groups of the central magnetic part share the common magnetic group of the side magnetic part and form two magnetic gaps, so that the two voice coils can make full use of the magnetic field of the central magnetic part, improve the magnetic energy utilization rate of the central magnetic part, thereby improving the loudness and sensitivity of the sound-emitting device, so as to improve product performance. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0029] Figure 1 A cross-sectional schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0030] Figure 2 An exploded schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0031] Figure 3 A cross-sectional schematic diagram of an embodiment of a magnetic circuit system provided by the present invention;

[0032] Figure 4 An exploded schematic diagram of an embodiment of a magnetic circuit system provided by the present invention;

[0033] Figure 5 A schematic structural diagram of an embodiment of a skeleton provided by the present invention.

[0034] Description of Figure Numbers:

[0035] 100. Sounding device; 1. Shell; 11. Mounting cavity; 12. First through hole; 13. Second through hole; 14. Support member; 15. First shell; 16. Second shell; 2. Magnetic circuit system; 21. Magnetic yoke; 211. First magnetic yoke; 212. Second magnetic yoke; 22. Central magnetic part; 221. Central magnetic group; 2211. First central magnet; 2212. Central magnetic plate; 2213. Second central magnet; 23. Side magnetic part; 231. External magnetic group; 2311 , avoidance gap; 232, common magnetic group; 2321, first side magnet; 2322, side magnetic plate; 2323, second side magnet; 24, magnetic gap; 3, vibration system; 31, diaphragm; 311, inner ring; 312, inner ring hole; 313, first fold ring; 314, straight part; 315, second fold ring; 316, fixed part; 317, reinforcement part; 32, voice coil; 33, skeleton; 331, first connecting part; 332, connecting arm; 333, second connecting part.

[0036] 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

[0037] 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.

[0038] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0040] In addition, in the present invention, descriptions such as "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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] In recent years, convenient electronic devices (such as mobile phones, headphones, and computers) have become part of people's daily lives. With the rapid development of technology, the popularity of speakers is increasing, and people's demand for the sound quality of electronic devices is also increasing. Full-frequency and miniaturization of speakers have become mainstream demands. At the same time, people's requirements for speakers are not limited to the playback of video and audio, but also have higher requirements for the sound quality and reliability of the sound played by the speakers. Speakers are directly related to the sound quality of the sound played and the stability of the product.

[0042] In the related technology, the micro speakers used in electronic devices such as tablets and laptops are usually large in size, and the existing large-size ultra-thin speakers usually use a single voice coil solution, which makes the magnetic energy utilization rate of the middle area of ​​the central magnet in the magnetic circuit system low and cannot be effectively utilized, thus affecting the loudness and sensitivity of the micro speakers. The loudness of micro speakers generally cannot meet the demand, so it is an important task to further improve the utilization rate of magnets and enhance the sensitivity of speakers.

[0043] Based on the above concepts and problems, the present invention proposes a sound-generating device 100. It can be understood that the sound-generating device 100 can be applied to electronic devices, and the electronic devices can be smart watches, mobile phones, tablets, computers, headphones, etc., which are not limited here.

[0044] Please refer to Figures 1 to 5As shown, in the embodiment of the present invention, the sound-generating device 100 includes a magnetic circuit system 2 and a vibration system 3, the magnetic circuit system 2 includes a magnetic yoke 21 and a central magnetic portion 22 and a side magnetic portion 23 arranged on the magnetic yoke 21, the central magnetic portion 22 includes two central magnetic groups 221 arranged at intervals, the side magnetic portion 23 includes an outer magnetic group 231 located outside the two central magnetic groups 221 and a common magnetic group 232 located between the two central magnetic groups 221, the outer magnetic group 231 and the common magnetic group 232 are spaced from each central magnetic group 221 to enclose two magnetic gaps 24 arranged at intervals, each central magnetic group 221 includes a first central magnetic group 221 arranged in a stacked manner, and the outer magnetic group 231 and the common magnetic group 232 are spaced from each central magnetic group 221 to enclose two magnetic gaps 24 arranged at intervals, and each central magnetic group 221 includes a first central magnetic group 221 arranged in a stacked manner. The core magnet 2211, the central magnetic plate 2212 and the second central magnet 2213, the outer magnetic group 231 and the common magnetic group 232 all include a first side magnet 2321, a side magnetic plate 2322 and a second side magnet 2323 that are stacked, the vibration system 3 includes a diaphragm 31 and two voice coils 32 connected to the diaphragm 31, and each voice coil 32 is arranged corresponding to a magnetic gap 24; wherein the first central magnet 2211, the central magnetic plate 2212 and the second central magnet 2213 respectively correspond to the first side magnet 2321, the side magnetic plate 2322 and the second side magnet 2323 in a one-to-one manner perpendicular to the vibration direction of the vibration system 3.

[0045] In this embodiment, the sound-generating device 100 is a micro speaker. It should be noted that the magnetic circuit system 2 of the sound-generating device 100 and the diaphragm 31 of the vibration system 3 are arranged relative to each other. Of course, in other embodiments, the diaphragm 31 of the vibration system 3 can also be arranged on the periphery of the magnetic circuit system 2, which is not limited here.

[0046] Optionally, the magnetic circuit system 2 may be arranged in a square shape. For example, the magnetic circuit system 2 may include a central magnetic portion 22 and a side magnetic portion 23 both of which are in a square structure. The vibration system 3 may optionally be arranged in a square shape. It is understandable that the periphery of the diaphragm 31 of the vibration system 3 may be connected to the magnetic circuit system 2, or the magnetic circuit system 2 and the vibration system 3 may be respectively mounted on a housing or a module housing, etc., which is not limited here.

[0047] In order to better assemble the magnetic circuit system 2 and the vibration system 3 of the sound generating device 100. In one embodiment, as Figure 1 and Figure 2 As shown, the sound-generating device 100 further includes a housing 1 , and a magnetic circuit system 2 and a vibration system 3 are accommodated in the housing 1 .

[0048] In this embodiment, the housing 1 is used to install, fix and support components such as the magnetic circuit system 2 and the vibration system 3, that is, the housing 1 provides an installation base for components such as the magnetic circuit system 2 and the vibration system 3. It can be understood that the housing 1 can be an integral structure or can be formed by the cooperation of multiple split structures, which is not limited here.

[0049] Optionally, the shell 1 can be selected as a frame or frame structure, that is, the shell 1 has a cavity with openings at both ends, and the magnetic circuit system 2 and the vibration system 3 are respectively connected to the two sides of the shell 1, so that the magnetic circuit system 2, the shell 1 and the vibration membrane 31 of the vibration system 3 enclose a vibration cavity.

[0050] In this embodiment, the housing 1 may be a BOX structure, that is, the housing 1 has an installation cavity 11, and the magnetic circuit system 2 and the vibration system 3 are both arranged in the installation cavity 11. It can be understood that the periphery of the diaphragm 31 of the vibration system 3 is connected to the housing 1, and is opposite to and spaced from the magnetic circuit system 2; or, the periphery of the diaphragm 31 of the vibration system 3 is connected to the housing 1, and the center of the diaphragm 31 is connected to the central magnetic part 22 of the magnetic circuit system 2, and is opposite to the magnetic circuit system 2; or, the periphery of the diaphragm 31 of the vibration system 3 is connected to the housing 1, and the center of the diaphragm 31 is provided with a through hole structure for the magnetic circuit system 2 to pass through, and at this time, the center of the diaphragm 31 is connected to the side magnetic part 23 of the magnetic circuit system 2 or the support 14 on the housing 1, which is not limited here.

[0051] It can be understood that the sound-generating device 100 is applied to electronic devices, that is, the sound-generating device 100 can be installed in the electronic device through the housing 1. It should be noted that the housing 1 of the sound-generating device 100 can be a housing or box structure independent of the electronic device. In this case, the housing 1 is used to integrate the magnetic circuit system 2 and the vibration system 3 of the sound-generating device 100 into an integral structure, so as to facilitate disassembly and assembly. Of course, the housing 1 of the sound-generating device 100 can also be an integrally formed structure with the housing or box structure of the electronic device, which can effectively improve the structural strength and sealing performance, while reducing the size of the electronic device.

[0052] In this embodiment, the housing 1 is used to accommodate and fix the vibration system 3, the magnetic circuit system 2 and other structures, so that the sound-generating device 100 can be used as an independent component in an electronic device.

[0053] It can be understood that by setting the magnetic circuit system 2 as a magnetic yoke 21 and a central magnetic portion 22 and a side magnetic portion 23 provided on the magnetic yoke 21, the magnetic circuit system 2 can be connected to the outer shell 1 through the magnetic yoke 21; or, the magnetic circuit system 2 can be connected to the outer shell 1 through the side magnetic portion 23, which is not limited here. In this embodiment, the central magnetic portion 22 is arranged as two central magnetic groups 221 arranged at intervals, and the side magnetic portion 23 is arranged as an outer magnetic group 231 located outside the two central magnetic groups 221 and a common magnetic group 232 located between the two central magnetic groups 221, so that the outer magnetic group 231 and the common magnetic group 232 of the side magnetic portion 23 are cooperatively arranged at the periphery of the two central magnetic groups 221, and the outer magnetic group 231 and the common magnetic group 232 of the side magnetic portion 23 are both spaced apart from each central magnetic group 221, so as to enclose two magnetic gaps 24 arranged at intervals, that is, the two magnetic gaps 24 are located on opposite sides of the common magnetic group 232, and each magnetic gap 24 is arranged around a central magnetic group 221, so that the diaphragm 31 of the vibration system 3 is connected to the housing 1, so that one end of the two voice coils 32 is connected to the diaphragm 31, and the other ends of the two voice coils 32 are respectively arranged corresponding to the two magnetic gaps 24.

[0054] In order to realize the electrical connection between the two voice coils 32 and the external circuit, in one embodiment, the vibration system 3 further includes a centering support plate or a connecting member or a frame 33, one end of which is connected to the two voice coils 32 and is connected to the leads of the two voice coils 32, and the other end of which is connected to the housing 1.

[0055] It can be understood that, taking the centering support as an example, the two ends of the centering support are electrically connected to the lead wire of the voice coil 32 and the external circuit respectively. In this embodiment, the centering support can be arranged at the bottom of the voice coil 32, and the centering support is located at the four corners of the sound-generating device 100 or in the short axis or long axis direction of the sound-generating device 100. Of course, the centering support can also be arranged at the top of the voice coil 32, and the centering support is located between the voice coil 32 and the diaphragm 31, which is not limited here.

[0056] In this embodiment, each central magnetic group 221 of the central magnetic part 22 is configured as a first central magnet 2211, a central magnetic plate 2212 and a second central magnet 2213 which are stacked, and the outer magnetic group 231 and the common magnetic group 232 of the side magnetic part 23 are configured as a first side magnet 2321, a side magnetic plate 2322 and a second side magnet 2323 which are stacked, so that the first central magnet 2211, the central magnetic plate 2212 and the second central magnet 2213 of the central magnetic group 221 are respectively connected to the outer magnetic group 2 The first side magnet 2321, the side magnetic plate 2322 and the second side magnet 2323 of the common magnetic group 231 and the common magnetic group 232 correspond one by one to each other in a vibration direction perpendicular to the vibration system 3, so that the two central magnetic groups 221 of the central magnetic part 22 share the common magnetic group 232 of the side magnetic part 23 and form two magnetic gaps 24, so that the two voice coils 32 can make full use of the magnetic field of the central magnetic part 22, improve the magnetic energy utilization rate of the central magnetic part 22, thereby improving the loudness and sensitivity of the sound-generating device 100 to improve product performance.

[0057] In one embodiment, the diaphragm 31 has two long axis sides and two short axis sides connected end to end, and the two central magnetic groups 221 are arranged at intervals along the direction of the long axis sides.

[0058] In this embodiment, if Figure 2 As shown, the diaphragm 31 may be arranged in a rectangular shape, that is, the diaphragm 31 has two long axis sides and two short axis sides connected end to end. Optionally, the two central magnetic groups 221 of the central magnetic part 22 are arranged at intervals along the direction of the long axis side, that is, the two magnetic gaps 24 of the magnetic circuit system 2 are arranged at intervals along the direction of the long axis side, so that the two voice coils 32 are arranged at intervals along the direction of the long axis side.

[0059] In one embodiment, if Figure 2 and Figure 4 As shown, the outer magnetic groups 231 of the side magnetic part 23 include a plurality of them. The plurality of outer magnetic groups 231 are arranged around the outer sides of the two central magnetic groups 221 of the central magnetic part 22 , and adjacent outer magnetic groups 231 are spaced to form gaps.

[0060] It can be understood that each of the multiple external magnetic groups 231 includes a first side magnet 2321, a side magnetic plate 2322, and a second side magnet 2323 that are stacked. At this time, the adjacent first side magnets 2321 in the adjacent external magnetic groups 231 are spaced to form a gap, the adjacent side magnetic plates 2322 are spaced to form a gap, and the adjacent second side magnets 2323 are spaced to form a gap, so that the multiple external magnetic groups 231 are spaced and surrounded to form a ring structure with a gap, which is not limited here. Optionally, the gap formed by the spacing between adjacent external magnetic groups 231 is an avoidance gap 2311.

[0061] In this embodiment, the first side magnet 2321 and the second side magnet 2323 of the external magnetic group 231 and the common magnetic group 232 may be selected as permanent magnets. It can be understood that the first side magnet 2321, the side magnetic plate 2322 and the second side magnet 2323 of the external magnetic group 231 and the common magnetic group 232 are stacked along the moving direction of the voice coil 32, that is, the first side magnet 2321 and / or the second side magnet 2323 are connected to the magnetic yoke 21, the side magnetic plate 2322 is stacked between the first side magnet 2321 and the second side magnet 2323, and the second side magnet 2323 is stacked on the side magnetic plate 2322 facing away from the first side magnet 2321.

[0062] Optionally, the first center magnet 2211, the center magnetic plate 2212 and the second center magnet 2213 of the two center magnetic groups 221 are all in a square plate-like structure, which is not limited here. The first center magnet 2211 and the second center magnet 2213 can be selected as permanent magnets. The first center magnet 2211, the center magnetic plate 2212 and the second center magnet 2213 of the two center magnetic groups 221 are all stacked along the moving direction of the voice coil 32, which is not limited here.

[0063] The sound-generating device 100 of the present invention sets the magnetic circuit system 2 as a magnetic yoke 21 and a central magnetic part 22 and a side magnetic part 23 provided on the magnetic yoke 21. By setting the central magnetic part 22 as two central magnetic groups 221 set at intervals, and setting the side magnetic part 23 as an outer magnetic group 231 located outside the two central magnetic groups 221 and a common magnetic group 232 located between the two central magnetic groups 221, the outer magnetic group 231 and the common magnetic group 232 of the side magnetic part 23 are spaced apart from each central magnetic group 221 to enclose and form two magnetic gaps 24 set at intervals, and the two voice coils 32 of the vibration system 3 are respectively set corresponding to the two magnetic gaps 24, so that current is passed through the two voice coils 32, so that the two voice coils 32 respectively vibrate in the magnetic fields of the two magnetic gaps 24 formed by the magnetic circuit system 2 and drive the diaphragm 31 to vibrate and produce sound; at the same time, by setting each central magnetic group 221 as a first central magnet 2211, The central magnetic plate 2212 and the second central magnet 2213, and the outer magnetic group 231 and the common magnetic group 232 are both set to be the first side magnet 2321, the side magnetic plate 2322 and the second side magnet 2323 which are stacked, so that the first central magnet 2211, the central magnetic plate 2212 and the second central magnet 2213 of the two central magnetic groups 221 correspond to the first side magnet 2321, the side magnetic plate 2322 and the second side magnet 2323 of the outer magnetic group 231 and the common magnetic group 232 of the side magnetic part 23 in a one-to-one manner perpendicular to the vibration direction of the vibration system 3, so that the two central magnetic groups 221 of the central magnetic part 22 share the common magnetic group 232 of the side magnetic part 23 and form two magnetic gaps 24, so that the two voice coils 32 can make full use of the magnetic field of the central magnetic part 22, improve the magnetic energy utilization rate of the central magnetic part 22, thereby improving the loudness and sensitivity of the sound-emitting device 100, so as to improve product performance.

[0064] In one embodiment, the first center magnet 2211 and the second center magnet 2213 are both magnetized along the vibration direction of the vibration system 3, and the magnetic poles of the first center magnet 2211 and the second center magnet 2213 close to the center magnetic conductive plate 2212 are the same; the first side magnet 2321 and the second side magnet 2323 are both magnetized along the vibration direction of the vibration system 3, and the magnetic poles of the first side magnet 2321 and the second side magnet 2323 close to the side magnetic conductive plate 2322 are the same; the magnetic poles of the first center magnet 2211 and the second center magnet 2213 close to the center magnetic conductive plate 2212 are opposite to the magnetic poles of the first side magnet 2321 and the second side magnet 2323 close to the side magnetic conductive plate 2322.

[0065] In this embodiment, if Figure 1 and Figure 3As shown, the vibration direction of the vibration system 3 can be selected as the vertical direction. Optionally, the first side magnet 2321 and the second side magnet 2323 of the outer magnetic group 231 and the common magnetic group 232 are magnetized in the vertical direction, and the first center magnet 2211 and the second center magnet 2213 of the two center magnetic groups 221 are magnetized in the vertical direction.

[0066] It should be noted that Figure 3 The arrow direction in the magnetic circuit system 2 is from the S pole to the N pole, i.e., the magnetization direction. The first center magnet 2211 and the second center magnet 2213 of the two center magnetic groups 221 are magnetized in the vertical direction in opposite directions; the first side magnet 2321 and the second side magnet 2323 of the outer magnetic group 231 and the common magnetic group 232 are magnetized in the vertical direction in opposite directions. It can be understood that such an arrangement allows the center magnetic part 22 and the side magnetic part 23 to form a magnetic circuit passing through the voice coil 32 in the magnetic gap 24.

[0067] It can be understood that the magnetization direction of the first center magnet 2211 is opposite to the magnetization direction of the second center magnet 2213, so that the magnetic flux lines of the first center magnet 2211 and the second center magnet 2213 of the center magnetic part 22 are gathered on the center magnetic conductive plate 2212, and the magnetic field with a stronger magnetic field strength generated by the center magnetic part 22 passes through the magnetic gap 24, thereby increasing the density of the magnetic flux of the magnetic gap 24, increasing the number of magnetic flux lines passing through the voice coil 32, increasing the magnetic field force on the voice coil 32, and effectively improving the BL value. At the same time, the magnetization direction of the first side magnet 2321 is opposite to the magnetization direction of the second side magnet 2323, so that the magnetic flux lines of the first side magnet 2321 and the second side magnet 2323 of the side magnet portion 23 are gathered on the side magnetic conductive plate 2322, and the magnetic field with a stronger magnetic field strength generated by the side magnet portion 23 passes through the magnetic gap 24, thereby increasing the density of the magnetic flux of the magnetic gap 24, increasing the number of magnetic flux lines passing through the voice coil 32, and increasing the magnetic field force on the voice coil 32, thereby effectively improving the BL value.

[0068] In this embodiment, when the first central magnet 2211 is magnetized from top to bottom, the second central magnet 2213 is magnetized from bottom to top, the first side magnet 2321 is magnetized from bottom to top, and the second side magnet 2323 is magnetized from top to bottom, that is, the N pole of the first central magnet 2211 is at the bottom and the S pole is at the top, the N pole of the second central magnet 2213 is at the top and the S pole is at the bottom, the N pole of the first side magnet 2321 is at the top and the S pole is at the bottom, and the N pole of the second side magnet 2323 is at the bottom and the S pole is at the top, and vice versa.

[0069] It can be understood that the magnetic poles of the first central magnet 2211 and the second central magnet 2213 near the central magnetic plate 2212 are the same, that is, the magnetic poles of the first central magnet 2211 and the second central magnet 2213 near the central magnetic plate 2212 are both N poles or S poles. The magnetic poles of the first side magnet 2321 and the second side magnet 2323 near the side magnetic plate 2322 are the same, that is, the magnetic poles of the first side magnet 2321 and the second side magnet 2323 near the side magnetic plate 2322 are both S poles or N poles. In this embodiment, when the magnetic poles of the first central magnet 2211 and the second central magnet 2213 near the central magnetic plate 2212 are both N poles, the magnetic poles of the first side magnet 2321 and the second side magnet 2323 near the side magnetic plate 2322 are both S poles, and vice versa. Such an arrangement can make the central magnetic part 22 and the side magnetic part 23 form a magnetic circuit passing through the voice coil 32 in the magnetic gap 24, which is not limited here.

[0070] In one embodiment, the first center magnet 2211 includes multiple first center magnets 2211, which are arranged adjacent to each other and located between the central magnetic plate 2212 and the magnetic yoke 21; wherein the multiple first center magnets 2211 are all magnetized along the vibration direction of the vibration system 3, and the magnetization directions of the multiple first center magnets 2211 are the same.

[0071] Optionally, multiple first center magnets 2211 are laid flat between the magnetic yoke 21 and the center magnetic plate 2212. Multiple first center magnets 2211 are magnetized in the vertical direction, and the magnetization directions of multiple first center magnets 2211 are the same. That is, multiple first center magnets 2211 are magnetized in the direction of movement of the voice coil 32, and multiple first center magnets 2211 are magnetized upward or downward at the same time, which is not limited here.

[0072] In one embodiment, the second center magnet 2213 includes a plurality of second center magnets 2213, which are arranged adjacent to each other and located on the side of the center magnetic conductive plate 2212 facing away from the first center magnet 2211; wherein the plurality of second center magnets 2213 are all magnetized along the vibration direction of the vibration system 3, and the magnetization directions of the plurality of second center magnets 2213 are the same.

[0073] Optionally, multiple second center magnets 2213 are laid flat on the side of the center magnetic conductive plate 2212 facing away from the first center magnet 2211. Multiple second center magnets 2213 are magnetized in the vertical direction, and the magnetization directions of multiple second center magnets 2213 are the same. That is, multiple second center magnets 2213 are magnetized in the direction of movement of the voice coil 32, and multiple second center magnets 2213 are magnetized upward or downward at the same time, which is not limited here.

[0074] In one embodiment, the first side magnet 2321 includes multiple first side magnets 2321, which are arranged adjacent to each other and located between the side magnetic conductive plate 2322 and the magnetic conductive yoke 21; wherein the multiple first side magnets 2321 are all magnetized along the vibration direction of the vibration system 3, and the magnetization directions of the multiple first side magnets 2321 are the same.

[0075] Optionally, multiple first side magnets 2321 are laid flat between the magnetic yoke 21 and the side magnetic plate 2322. Multiple first side magnets 2321 are magnetized in the vertical direction, and the magnetization directions of multiple first side magnets 2321 are the same. That is, multiple first side magnets 2321 are magnetized in the direction of movement of the voice coil 32, and multiple first side magnets 2321 are magnetized upward or downward at the same time, which is not limited here.

[0076] In one embodiment, the second side magnet 2323 includes multiple second side magnets 2323, which are arranged adjacent to each other and located on the side of the side magnetic conductive plate 2322 facing away from the first side magnet 2321; wherein the multiple second side magnets 2323 are all magnetized along the vibration direction of the vibration system 3, and the magnetization directions of the multiple second side magnets 2323 are the same.

[0077] Optionally, multiple second side magnets 2323 are laid flat on the side of the side magnetic conductive plate 2322 facing away from the first side magnet 2321. Multiple second side magnets 2323 are magnetized in the vertical direction, and the magnetization directions of multiple second side magnets 2323 are the same. That is, multiple second side magnets 2323 are magnetized in the direction of movement of the voice coil 32, and multiple second side magnets 2323 are magnetized upward or downward at the same time, which is not limited here.

[0078] In one embodiment, at least a portion of the projection of the edge magnetic plate 2322 along the vibration direction perpendicular to the vibration system 3 overlaps with the projection of the voice coil 32 along the vibration direction perpendicular to the vibration system 3. It can be understood that such a configuration allows the magnetic flux lines of the first edge magnet 2321 and the second edge magnet 2323 of the edge magnetic portion 23 to gather on the edge magnetic plate 2322 and pass through the magnetic gap 24, thereby increasing the density of the magnetic flux of the magnetic gap 24, so that the voice coil 32 is in a more reasonable magnetic field, so as to alleviate the distortion of the audio output by the sound-generating device 100 and improve the sound quality of the audio output by the sound-generating device 100. Optionally, the projection of the edge magnetic plate 2322 along the horizontal direction is located in the projection of the voice coil 32 along the horizontal direction.

[0079] Optionally, the thickness of the side magnetic conductive plate 2322 is less than or equal to the thickness of the first side magnet 2321 , and the thickness of the side magnetic conductive plate 2322 is less than or equal to the thickness of the second side magnet 2323 , which is not limited here.

[0080] In one embodiment, at least a portion of the projection of the central magnetic conductive plate 2212 along the vibration direction perpendicular to the vibration system 3 coincides with the projection of the voice coil 32 along the vibration direction perpendicular to the vibration system 3. It can be understood that such a configuration enables the magnetic flux lines of the first central magnet 2211 and the second central magnet 2213 of the central magnetic portion 22 to gather on the central magnetic conductive plate 2212 and pass through the magnetic gap 24, thereby increasing the density of the magnetic flux of the magnetic gap 24, so that the voice coil 32 is in a more reasonable magnetic field, so as to alleviate the distortion of the audio output by the sound-generating device 100 and improve the sound quality of the audio output by the sound-generating device 100. Optionally, the projection of the central magnetic conductive plate 2212 along the horizontal direction is located in the projection of the voice coil 32 along the horizontal direction.

[0081] Optionally, the thickness of the central magnetic conductive plate 2212 is less than or equal to the thickness of the first central magnet 2211, and the thickness of the central magnetic conductive plate 2212 is less than or equal to the thickness of the second central magnet 2213, which is not limited here. In this embodiment, the thickness of the central magnetic conductive plate 2212 can be equivalent to the thickness of the side magnetic conductive plate 2322.

[0082] In this embodiment, if Figure 1 and Figure 3 As shown, the thickness of the first center magnet 2211 along the vibration direction of the vibration system 3 can be optionally the same as the thickness of the first side magnet 2321 along the vibration direction of the vibration system 3. Optionally, the thickness of the second center magnet 2213 along the vibration direction of the vibration system 3 is the same as the thickness of the second side magnet 2323 along the vibration direction of the vibration system 3. Optionally, the thickness of the center magnetic plate 2212 along the vibration direction of the vibration system 3 is the same as the thickness of the side magnetic plate 2322 along the vibration direction of the vibration system 3. Such an arrangement can ensure that the force generated to drive the voice coil 32 is equivalent, thereby improving the stability of the vibration of the voice coil 32.

[0083] In one embodiment, the sound generating device 100 further includes a housing 1 , the housing 1 is provided with a mounting cavity 11 , and the magnetic circuit system 2 and the vibration system 3 are disposed in the mounting cavity 11 .

[0084] In this embodiment, if Figure 1 and Figure 2 As shown, the housing 1 includes a first shell 15 and a second shell 16, and the first shell 15 and the second shell 16 enclose a mounting cavity 11. It can be understood that the first shell 15 and / or the second shell 16 include a bottom plate and a side plate arranged at the periphery of the bottom plate, so that the side plate and the bottom plate enclose a receiving cavity with an opening at one end, and at this time, the first shell 15 and the second shell 16 are connected to cover the opening and enclose the mounting cavity 11.

[0085] It can be understood that the magnetic circuit system 2 is disposed between the first shell 15 and the second shell 16, and the periphery of the diaphragm 31 of the vibration system 3 is connected to the first shell 15 and / or the second shell 16. Optionally, the first magnetic yoke 211 and the second magnetic yoke 212 of the magnetic circuit system 2 are respectively connected to the bottom plates of the first shell 15 and the second shell 16, and at this time, a through hole structure for the magnetic circuit system 2 to pass through is provided in the center of the diaphragm 31, the periphery of the diaphragm 31 is connected to the shell 1, and the center of the diaphragm 31 is connected to the magnetic circuit system 2 or the shell 1, which is not limited here.

[0086] In one embodiment, the magnetic yoke 21 includes a first magnetic yoke 211 and a second magnetic yoke 212 arranged opposite to each other, the central magnetic portion 22 and the side magnetic portion 23 are both arranged between the first magnetic yoke 211 and the second magnetic yoke 212, the first side magnet 2321 and the first center magnet 2211 are both connected to the first magnetic yoke 211, and the second side magnet 2323 and the second center magnet 2213 are connected to the second magnetic yoke 212.

[0087] In this embodiment, if Figure 1 and Figure 2 As shown, by setting the magnetic yoke 21 as the first magnetic yoke 211 and the second magnetic yoke 212 which are arranged opposite to each other, an installation space is formed between the first magnetic yoke 211 and the second magnetic yoke 212. At this time, the central magnetic part 22 and the side magnetic part 23 are arranged between the first magnetic yoke 211 and the second magnetic yoke 212, that is, the first central magnet 2211 of the central magnetic part 22 and the first side magnet 2321 of the side magnetic part 23 are connected to the first magnetic yoke 211, and the second central magnet 2213 of the central magnetic part 22 and the second side magnet 2323 of the side magnetic part 23 are connected to the second magnetic yoke 212.

[0088] It can be understood that in this way, the magnetic flux lines generated by the central magnetic portion 22 and the magnetic flux lines generated by the side magnetic portion 23 can effectively form a magnetic circuit that passes through the voice coil 32 in the magnetic gap 24, effectively increasing the density of the magnetic flux in the magnetic gap 24, so that the voice coil 32 is in a more reasonable magnetic field, thereby alleviating the distortion of the audio output by the sound-emitting device 100 and improving the sound quality of the audio output by the sound-emitting device 100.

[0089] In one embodiment, the housing 1 further comprises a first through hole 12 and a second through hole 13 connected to the mounting cavity 11 , the first yoke 211 is connected to the housing 1 and is located in the first through hole 12 , and the second yoke 212 is connected to the housing 1 and is located in the second through hole 13 .

[0090] In this embodiment, if Figure 1 and Figure 2As shown, the first shell 15 and the second shell 16 both include a bottom plate and a side plate arranged at the periphery of the bottom plate, and the bottom plates of the first shell 15 and the second shell 16 are respectively provided with a first through hole 12 and a second through hole 13 corresponding to the first magnetic yoke 211 and the second magnetic yoke 212 of the magnetic yoke 21, that is, the bottom plate of the first shell 15 is provided with a first through hole 12, and the bottom plate of the second shell 16 is provided with a second through hole 13.

[0091] It can be understood that the first magnetic yoke 211 of the magnetic yoke 21 is connected to the first shell 15 of the housing 1 and is located in the first through hole 12, and the second magnetic yoke 212 of the magnetic yoke 21 is connected to the second shell 16 of the housing 1 and is located in the second through hole 13. Optionally, the periphery of the diaphragm 31 is sandwiched between the first shell 15 and the second shell 16.

[0092] In one embodiment, the diaphragm 31 has an inner ring hole 312, the magnetic circuit system 2 is passed through the inner ring hole 312, the magnetic circuit system 2 is provided with an avoidance gap 2311 connecting each magnetic gap 24, and the vibration system 3 also includes a skeleton 33, one end of the skeleton 33 is connected to the diaphragm 31, and the other end of the skeleton 33 passes through the avoidance gap 2311 and is connected to each voice coil 32.

[0093] It can be understood that by configuring the diaphragm 31 as an annular diaphragm, the magnetic circuit system 2 is passed through the inner annular hole 312, thereby reducing the overall thickness of the product.

[0094] In this embodiment, if Figure 1 , Figure 2 and Figure 5 As shown, by setting the skeleton 33, the two voice coils 32 are connected to the diaphragm 31 through the skeleton 33, so that the two voice coils 32 can be ensured to be in a more reasonable magnetic field, that is, the area with the largest magnetic flux density, thereby effectively improving the BL value.

[0095] Optionally, the outer magnetic group 231 of the magnetic circuit system 2 is provided with an avoidance gap 2311 , and the avoidance gap 2311 is connected to the magnetic gap 24 , so that it is convenient for the skeleton 33 to pass through the avoidance gap 2311 and connect with the voice coil 32 .

[0096] In one embodiment, the skeleton 33 includes a first connection portion 331, a connection arm 332 and a second connection portion 333, the two ends of the connection arm 332 are respectively connected to the first connection portion 331 and the second connection portion 333, the first connection portion 331 is connected to the diaphragm 31, and the connection arm 332 passes through the avoidance gap 2311 to connect the second connection portion 333 to the voice coil 32.

[0097] It can be understood that when there is only one skeleton 33, the skeleton 33 includes a first connection part 331, a plurality of connection arms 332 and a plurality of second connection parts 333. Optionally, the first connection part 331 is arranged in an annular shape and connected to the diaphragm 31, the plurality of connection arms 332 and the plurality of second connection parts 333 are all located on the inner side of the first connection part 331, one end of the plurality of connection arms 332 is connected to the first connection part 331 and arranged at intervals, and at least one second connection part 333 is connected to one end of the connection arm 332 away from the first connection part 331; wherein at least one connection arm 332 extends into a magnetic gap 24 through the avoidance notch 2311, so that at least one second connection part 333 is connected to a voice coil 32.

[0098] Optionally, the first connection portion 331 is arranged in a rectangular ring shape, and the connection arms 332 include four connection arms 332 , which are arranged corresponding to the four corners of the first connection portion 331 .

[0099] Of course, the skeleton 33 may also include multiple skeletons, for example, the skeleton 33 includes two or four skeletons. Figure 2 and Figure 5 As shown, there are two skeletons 33 , and the diaphragm 31 has two long axis sides and two short axis sides connected end to end; the two skeletons 33 are arranged at intervals along the short axis sides and are symmetrically arranged, and each skeleton 33 is correspondingly connected to one end of the two voice coils 32 .

[0100] Optionally, the two skeletons 33 may be arranged at intervals along the long axis or short axis of the diaphragm 31 and be symmetrically disposed.

[0101] In one embodiment, when the two skeletons 33 are arranged at intervals along the short axis and are symmetrically arranged, that is, the two skeletons 33 are arranged corresponding to the two long axis sides of the diaphragm 31 respectively, each skeleton 33 is correspondingly connected to one end of the two voice coils 32.

[0102] In this embodiment, the skeleton 33 includes a first connecting part 331, a plurality of connecting arms 332 and a plurality of second connecting parts 333. The first connecting part 331 is connected to the diaphragm 31. The plurality of connecting arms 332 and the plurality of second connecting parts 333 are all located on the inner side of the first connecting part 331. One ends of the plurality of connecting arms 332 are all connected to the first connecting part 331 and are arranged at intervals. At least one second connecting part 333 is connected to one end of the connecting arm 332 away from the first connecting part 331. The plurality of connecting arms 332 extend into the magnetic gap 24 through the avoidance notch 2311 so that the second connecting part 333 is connected to the voice coil 32.

[0103] It can be understood that the multiple connecting arms 332 of one skeleton 33 respectively pass through the multiple avoidance gaps 2311 and extend into the two magnetic gaps 24, and are respectively connected to one end of the two voice coils 32 through the second connecting parts 333; the multiple connecting arms 332 of the other skeleton 33 respectively pass through the multiple avoidance gaps 2311 and extend into the two magnetic gaps 24, and are respectively connected to the other ends of the two voice coils 32 through the second connecting parts 333.

[0104] In another embodiment, when two skeletons 33 are arranged at intervals along the long axis and are symmetrically disposed, that is, the two skeletons 33 are disposed corresponding to the two short axis sides of the diaphragm 31 , each skeleton 33 is connected to a voice coil 32 .

[0105] It can be understood that the multiple connecting arms 332 of one skeleton 33 respectively pass through the multiple avoidance gaps 2311 and extend into a magnetic gap 24, and are respectively connected to the two ends of a voice coil 32 through the second connecting parts 333; the multiple connecting arms 332 of another skeleton 33 respectively pass through the multiple avoidance gaps 2311 and extend into another magnetic gap 24, and are respectively connected to the two ends of a voice coil 32 through the second connecting parts 333.

[0106] In this embodiment, one frame 33 may be connected to one voice coil 32. Of course, one frame 33 may be connected to the same side of two voice coils 32 at the same time.

[0107] Optionally, the skeleton 33 includes four skeletons, and the four skeletons 33 are respectively arranged corresponding to the four corner positions of the external magnetic group 231. Alternatively, the skeleton 33 includes eight skeletons, and each skeleton 33 is arranged corresponding to a corner position of the voice coil 32, which is not limited here.

[0108] In one embodiment, the arrangement direction of the two central magnetic groups 221 is defined as a first direction, and the outer magnetic group 231 includes a first part arranged on both sides of the two central magnetic groups 221 along the first direction and a second part arranged on both sides of the two central magnetic groups 221 along a direction perpendicular to the first direction, and an avoidance gap 2311 is formed between the first part and the second part and between the second part and the common magnetic group 232.

[0109] In this embodiment, if Figure 2 and Figure 4 As shown, the outer magnetic group 231 of the edge magnetic portion 23 can be optionally arranged in a rectangular frame, the outer magnetic group 231 has two long sides and two short sides, the two central magnetic groups 221 are arranged at intervals along the long sides, the first part of the outer magnetic group 231 is the two short sides, the second part of the outer magnetic group 231 is the two long sides, the common magnetic group 232 is located between the two short sides, parallel to the short sides, and perpendicular to the long sides, so that the outer magnetic group 231 is separated into two rectangular cavities by the common magnetic group 232.

[0110] Optionally, each corner position of the external magnetic group 231 is provided with an escape notch 2311, that is, an escape notch 2311 is provided between the long side and the short side. Of course, an escape notch 2311 may also be provided at the connection between the long side of the external magnetic group 231 and the common magnetic group 232. Optionally, the number of the connecting arms 332 of the skeleton 33 is consistent with the number of the escape notches 2311, and they are provided one by one, which is not limited here.

[0111] It is understandable that the leads of the two voice coils 32 can also be guided to the housing 1 through the skeleton 33 and connected to the external circuit. The skeleton 33 not only connects and fixes the voice coils 32, but also prevents the voice coils 32 from swinging or polarizing during vibration.

[0112] In one embodiment, the diaphragm 31 includes an inner ring portion 311, a first folded ring 313 arranged around the inner ring portion 311, a straight portion 314 arranged around the first folded ring 313, a second folded ring 315 arranged around the straight portion 314, and a fixed portion 316 connected to the outer side of the second folded ring 315, the fixed portion 316 is connected to the outer shell 1, the straight portion 314 is connected to the frame 33, and the inner ring portion 311 is formed with an inner ring hole 312.

[0113] In this embodiment, if Figure 1 and Figure 2 As shown, the inner ring portion 311 , the first fold ring 313 , the straight portion 314 , the second fold ring 315 and the fixing portion 316 of the diaphragm 31 may be an integrally formed structure, thereby ensuring the vibration performance and structural strength of the diaphragm 31 . Optionally, the magnetic circuit system 2 is disposed in the inner ring hole 312 .

[0114] It can be understood that the first fold ring 313 and the second fold ring 315 of the diaphragm 31 are in a convex structure that bulges upward or a concave structure that bulges downward, which is not limited here. Optionally, the convex direction of the first fold ring 313 is the same as or opposite to the convex direction of the second fold ring 315. In this embodiment, the first fold ring 313 and the second fold ring 315 can bulge upward or bulge downward at the same time. Of course, in other embodiments, one of the first fold ring 313 and the second fold ring 315 can bulge upward and the other can bulge downward, which is not limited here.

[0115] In one embodiment, if Figure 1 and Figure 2 As shown, the diaphragm 31 further includes a reinforcement portion 317, which is disposed between the straight portion 314 and the frame 33. It can be understood that by providing the reinforcement portion 317, the structural strength of the diaphragm 31 can be effectively strengthened, thereby improving the connection stability of the voice coil 32, and avoiding problems such as tearing of the diaphragm 31 when the voice coil 32 drives the diaphragm 31 to vibrate.

[0116] In one embodiment, the housing 1 is further provided with a support member 14 . The support member 14 is an annular structure. The support member 14 surrounds the magnetic circuit system 2 and is provided on a side of the diaphragm 31 away from the frame 33 . The inner circle of the diaphragm 31 is connected to the support member 14 .

[0117] In this embodiment, if Figure 1 and Figure 2 As shown, by providing the support member 14, it is convenient to use the support member 14 to fix the central part of the diaphragm 31, that is, the inner ring part 311 of the diaphragm 31 is connected to the support member 14. It can be understood that the support member 14 is protruding from the bottom plate of the first shell 15 and / or the second shell 16. The support member 14 is adjacent to the magnetic circuit system 2.

[0118] Optionally, the support member 14 is arranged in an annular shape, and the support member 14 surrounds the magnetic circuit system 2. By arranging the support member 14 on the side of the diaphragm 31 away from the skeleton 33, the inner ring portion 311 is connected to the support member 14, so that the diaphragm 31 can be fixed, and the skeleton 33 and the two voice coils 32 can be supported and fixed.

[0119] In this embodiment, the side of the diaphragm 31 away from the skeleton 33 is enclosed with the shell 1 to form a front cavity, that is, the diaphragm 31 and the first shell 15 are enclosed to form a front cavity, and the side of the diaphragm 31 facing the skeleton 33 is enclosed with the shell 1 to form a rear cavity, that is, the diaphragm 31 and the second shell 16 are enclosed to form a rear cavity. It can be understood that in order to facilitate the sound-emitting device 100 to produce sound smoothly, the shell 1 is provided with a sound outlet hole connected to the front cavity. By providing the support member 14, it can be effectively ensured that the diaphragm 31 isolates the front cavity and the rear cavity. In order to ensure the air pressure balance between the front cavity and the rear cavity, the shell 1 is provided with an air vent connected to the rear cavity, which is not limited here.

[0120] The present invention further provides an electronic device, which includes the above-mentioned sound-generating device 100. The specific structure of the sound-generating device 100 refers to the above-mentioned embodiment. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0121] In one embodiment, the electronic device further includes a device housing, the device housing has an installation space, and the sound-generating device 100 is disposed in the installation space of the device housing.

[0122] In this embodiment, the electronic device further includes a flexible circuit board, one end of which is electrically connected to the sound-generating device 100, and the other end of which is used to connect to an external power source. It can be understood that the flexible circuit board is used to connect the external circuit to the two voice coils 32 of the sound-generating device 100. The flexible circuit board is provided with an inner pad and an outer pad, the inner pad of the flexible circuit board is connected to the sound-generating device 100, and the outer pad of the flexible circuit board is used to connect to an external terminal.

[0123] In this embodiment, the device housing has an installation space, the sound device 100 is disposed in the installation space of the device housing, and at least one end of the flexible circuit board connected to the sound device 100 is located in the installation space of the device housing. Of course, in other embodiments, the flexible circuit board can also be entirely disposed in the installation space of the device housing, which is not limited here.

[0124] It is understandable that the electronic device can be headphones, mobile phones, MP3, MP4, computers, tablet computers, smart wearable devices, etc., which are not limited here. In the electronic device, the sound device 100 can be assembled into the housing of the electronic device in the form of a module, or it can be assembled into the housing of the electronic device in the form of a single body.

[0125] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, 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: The sound-generating device comprises: A magnetic circuit system, the magnetic circuit system includes a magnetic yoke and a central magnetic portion and a side magnetic portion arranged on the magnetic yoke, the central magnetic portion includes two central magnetic groups arranged at intervals, the side magnetic portion includes an outer magnetic group located outside the two central magnetic groups and a common magnetic group located between the two central magnetic groups, the outer magnetic group and the common magnetic group are both spaced apart from each of the central magnetic groups to enclose and form two magnetic gaps arranged at intervals, each of the central magnetic groups includes a first central magnet, a central magnetic plate and a second central magnet arranged in a stacked manner, the outer magnetic group and the common magnetic group both include a first side magnet, a side magnetic plate and a second side magnet arranged in a stacked manner; and A vibration system, the vibration system comprising a diaphragm and two voice coils connected to the diaphragm, each of the voice coils being arranged corresponding to one of the magnetic gaps; The first central magnet, the central magnetic conductive plate and the second central magnet respectively correspond to the first side magnet, the side magnetic conductive plate and the second side magnet in a one-to-one manner in a vibration direction perpendicular to the vibration system.

2. The sound-generating device according to claim 1, characterized in that: The first central magnet and the second central magnet are both magnetized along the vibration direction of the vibration system, and the magnetic poles of the first central magnet and the second central magnet close to the central magnetic conductive plate are the same; The first side magnet and the second side magnet are both magnetized along the vibration direction of the vibration system, and the magnetic poles of the first side magnet and the second side magnet close to the side magnetic conductive plate are the same; The magnetic poles of the first center magnet and the second center magnet close to the center magnetic conductive plate are opposite to the magnetic poles of the first side magnet and the second side magnet close to the side magnetic conductive plate.

3. The sound generating device according to claim 1, characterized in that: The diaphragm has two long axis sides and two short axis sides connected end to end, and the two central magnetic groups are arranged at intervals along the direction of the long axis sides.

4. The sound generating device according to any one of claims 1 to 3, characterized in that: The sound-generating device further comprises a shell, the shell is provided with an installation cavity, and the magnetic circuit system and the vibration system are arranged in the installation cavity.

5. The sound generating device according to claim 4, characterized in that: The magnetically conductive yoke includes a first magnetic yoke and a second magnetic yoke arranged opposite to each other, the central magnetic portion and the side magnetic portion are both arranged between the first magnetic yoke and the second magnetic yoke, the first side magnet and the first central magnet are both connected to the first magnetic yoke, and the second side magnet and the second central magnet are connected to the second magnetic yoke.

6. The sound generating device according to claim 5, characterized in that: The housing is further provided with a first through hole and a second through hole communicating with the mounting cavity. The first magnetic yoke is connected to the housing and located in the first through hole. The second magnetic yoke is connected to the housing and located in the second through hole.

7. The sound generating device according to claim 4, characterized in that: The diaphragm has an inner ring hole, the magnetic circuit system is passed through the inner ring hole, the magnetic circuit system is provided with an avoidance gap connected to each of the magnetic gaps, and the vibration system also includes a skeleton, one end of the skeleton is connected to the diaphragm, and the other end of the skeleton passes through the avoidance gap and is connected to each of the voice coils.

8. The sound generating device according to claim 7, characterized in that: There are two skeletons, and the diaphragm has two long axis sides and two short axis sides connected end to end; the two skeletons are arranged at intervals along the short axis sides and are symmetrically arranged, and each skeleton is correspondingly connected to one end of the two voice coils.

9. The sound-generating device according to claim 8, characterized in that: The skeleton comprises a first connection part, a plurality of connection arms and a plurality of second connection parts, the first connection part is connected to the diaphragm, the plurality of connection arms and the plurality of second connection parts are all located on the inner side of the first connection part, one end of the plurality of connection arms are all connected to the first connection part and are arranged at intervals, and at least one second connection part is connected to an end of the connection arm away from the first connection part; Wherein, a plurality of the connecting arms pass through the avoidance gap and extend into the magnetic gap, so that the second connecting portion is connected to the voice coil.

10. The sound generating device according to claim 7, characterized in that: The diaphragm includes an inner ring portion, a first folded ring arranged around the inner ring portion, a straight portion arranged around the first folded ring, a second folded ring arranged around the straight portion, and a fixed portion connected to the outer side of the second folded ring, the fixed portion is connected to the outer shell, the straight portion is connected to the frame, and the inner ring portion is formed with the inner ring hole.

11. The sound generating device according to claim 10, characterized in that: The inner ring portion, the first fold ring, the straight portion, the second fold ring and the fixing portion are an integrally formed structure; And / or, the protruding direction of the first fold ring is the same as or opposite to the protruding direction of the second fold ring; And / or, the diaphragm further includes a reinforcement portion, and the reinforcement portion is arranged between the straight portion and the frame.

12. The sound generating device according to claim 7, characterized in that: The housing is further provided with a support member, which is an annular structure, surrounds the magnetic circuit system and is provided on a side of the diaphragm away from the frame, and the inner ring of the diaphragm is connected to the support member; And / or, the arrangement direction of the two central magnetic groups is defined as a first direction, the outer magnetic group includes a first part arranged on both sides of the two central magnetic groups along the first direction and a second part arranged on both sides of the two central magnetic groups along a direction perpendicular to the first direction, and the avoidance gap is formed between the first part and the second part and between the second part and the common magnetic group.

13. An electronic device, characterized in that: The electronic device comprises the sound emitting device according to any one of claims 1 to 12.

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