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, each central magnetic part of a magnetic circuit system of the sound production device, edge magnetic parts arranged around the central magnetic part and a common magnetic part are enclosed to form a magnetic gap, and a vibration system comprises a diaphragm assembly, a conductive support chip, at least two voice coils and four centering support chips, the plurality of voice coils are arranged side by side, the voice coils at the two ends are respectively connected with the two corresponding centering support chips along the side-by-side direction of the plurality of voice coils, and the lead parts of the two adjacent voice coils are respectively and electrically connected with the conductive support chips, so that the two adjacent voice coils are arranged in series; the conductive support chip comprises a connecting part and two bonding pad parts, and the projection of the connecting part in the vibration direction of the vibration system is located in the middle of the common magnetic part. According to the sound production device, the conductive support chip is arranged between the two adjacent voice coils, so that the setting volume of the magnet in the magnetic circuit system can be increased, the BL value of the product is improved, and the loudness and sensitivity of the sound production device are further 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, with the rapid development of consumer electronic products, electronic devices such as smart phones and VR devices have been recognized by consumers and widely used. Those skilled in the art have also made corresponding improvements to related supporting products such as headphones to meet the performance requirements of electronic products and meet the needs of consumers for product performance.

[0003] The sound-generating device is an important electroacoustic transducer component in consumer electronic products. It is widely used as a speaker, receiver, earphone, etc. With the improvement of the performance of electronic products, the improvement of the acoustic performance of the sound-generating device is also an inevitable trend. In order to achieve better acoustic performance, the sound-generating device often needs to be equipped with a larger magnetic circuit system with stronger magnetic field strength.

[0004] In the related art, a plurality of voice coils are usually used to improve the acoustic performance of the sound-emitting device, and a centering support plate structure is adopted, and the centering support plates are arranged at the four corners of the sound-emitting device and on the long axis of the sound-emitting device to connect the four corners of the voice coil, thereby occupying the space of the magnetic circuit system, resulting in the side magnets of the magnetic circuit system being limited in size and unable to be increased, especially the side magnets occupying a large space on the long axis, thereby reducing the magnetic field strength of the magnetic circuit system, reducing the BL value, and affecting the acoustic performance of the sound-emitting device. Summary of the invention

[0005] 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 increases the magnetic field strength of the magnetic circuit system. The sound-generating device can increase the volume of the magnet setting in the magnetic circuit system, effectively improve the magnetic field strength, and improve the product BL value, thereby improving the loudness and sensitivity of the sound-generating device.

[0006] To achieve the above object, the present invention provides a sound-generating device, comprising:

[0007] shell;

[0008] A magnetic circuit system, the magnetic circuit system is connected to the housing, the magnetic circuit system includes a magnetic yoke and side magnetic parts, a common magnetic part and a central magnetic part arranged on the magnetic yoke, the central magnetic parts are respectively arranged on opposite sides of the common magnetic part, the side magnetic parts are arranged around the outside of the common magnetic part and the central magnetic part, and each of the central magnetic parts and the side magnetic parts and the common magnetic parts arranged around it form a magnetic gap; and

[0009] A vibration system, wherein the vibration system comprises a diaphragm assembly, a conductive support, at least two voice coils and four centering supports, wherein the periphery of the diaphragm assembly is connected to the housing and arranged opposite to the magnetic circuit system, the four centering supports are respectively arranged at the four corners of the housing, the plurality of voice coils are arranged side by side, one end of each voice coil is connected to the diaphragm assembly, the other end of each voice coil is suspended in a magnetic gap, the voice coils at both ends along the direction in which the plurality of voice coils are arranged side by side are respectively connected to the corresponding two centering supports, the conductive support is arranged on the side of the diaphragm assembly facing the magnetic circuit system and between two adjacent voice coils, the lead portions of the two adjacent voice coils are respectively electrically connected to the conductive supports, so that the two adjacent voice coils are arranged in series;

[0010] The number of the conductive support pieces is the same as the number of the common magnetic parts, each of the conductive support pieces includes a connecting part and two pad parts arranged at both ends of the connecting part, the two pad parts are located on opposite sides of the connecting part, the connecting part extends along the length direction of the common magnetic part, and the projection of each of the connecting parts along the vibration direction of the vibration system is located in the middle position of each of the common magnetic parts.

[0011] In one embodiment, the housing has two long axis sides and two short axis sides connected end to end, and the connection between the long axis sides and the short axis sides forms the corner portion;

[0012] The plurality of voice coils are arranged at intervals along the extension direction of the long axis, the extension direction of the common magnetic portion is consistent with the extension direction of the short axis, and is located between two adjacent voice coils.

[0013] In one embodiment, the central axis of the connecting portion along the short axis side coincides with the central axis of the common magnetic portion along the short axis side;

[0014] And / or, a central axis of the connecting portion along the long axis side coincides with a central axis of the long axis of the voice coil.

[0015] In one embodiment, the edge magnet portion is provided with an escape notch corresponding to each of the corners and connected to the magnetic gap, each of the centering support pieces is provided corresponding to one of the escape notches, and one end of each of the centering support pieces is connected to the corner, and the other end of each of the centering support pieces extends into the magnetic gap and is connected to the voice coil.

[0016] In one embodiment, the edge magnet portion includes a stacked edge magnet and an edge washer, and the edge magnet is connected to the magnetic yoke;

[0017] The side magnets include a first side magnet extending along the long axis and a second side magnet extending along the short axis, and the avoidance gap is formed between the adjacent first side magnets and the second side magnets;

[0018] The side washer includes a first side washer extending along the long axis and a second side washer extending along the short axis. The first side washer corresponds to the first side magnet, and the second side washer corresponds to the second side magnet.

[0019] In one embodiment, the side magnet includes two first side magnets, and each first side magnet is arranged corresponding to one of the long axis sides;

[0020] Or, the number of the voice coils is N, N≥2, and the side magnets include 2N first side magnets, each N first side magnets correspond to one of the long axis sides, and are arranged at intervals along the extension direction of the long axis side, so that a gap is formed between two adjacent first side magnets, the gap is opposite to the common magnetic part, and the width of the gap along the extension direction of the long axis side is smaller than the width of the common magnetic part along the extension direction of the long axis side.

[0021] In one embodiment, the side magnet includes one second side magnet arranged corresponding to each of the short axis sides, and each of the second side magnets and the common magnetic portion are located on opposite sides of the central magnetic portion; or, the side magnet includes a plurality of second side magnets arranged corresponding to each of the short axis sides, and the plurality of second side magnets arranged corresponding to each of the short axis sides are arranged adjacent to each other along the extension direction of the short axis sides;

[0022] and / or, the avoidance gap is formed between the adjacent first side washers and the second side washers;

[0023] And / or, the first side washer and the second side washer are integrally injection molded with the housing;

[0024] And / or, the first side washers corresponding to each of the long axis sides include one or more;

[0025] And / or, the second side washers corresponding to each of the short-axis sides include one or more.

[0026] In one embodiment, the common magnetic portion is provided with a avoidance structure corresponding to the conductive support piece;

[0027] Wherein, the avoidance structure is a groove formed by the common magnetic part being recessed toward the magnetic yoke; or, the avoidance structure is a through-hole structure penetrating the common magnetic part.

[0028] In one embodiment, the common magnetic part includes a common magnet and a common washer which are stacked, and the common magnet is connected to the magnetic yoke;

[0029] The avoidance structure comprises a first avoidance area and a second avoidance area which are connected to each other, wherein the first avoidance area is a groove formed by the common washer being recessed toward the common magnet, and the second avoidance area is a through hole structure or a gap which sequentially penetrates the common washer and the common magnet;

[0030] The connecting portion corresponds to the first avoidance area, and each of the pad portions corresponds to a second avoidance area.

[0031] In one embodiment, the edge magnet portion includes a stacked edge magnet and an edge washer, and the edge magnet is connected to the magnetic yoke;

[0032] Wherein, the common washer and the side washer are an integrally formed structure.

[0033] In one embodiment, the diaphragm assembly includes a diaphragm and a vibration plate, the diaphragm includes an inner fixing portion, a folding ring portion, and an outer fixing portion connected in sequence from the inside to the outside, the inner fixing portion is connected to the vibration plate, the outer fixing portion is connected to the outer shell, and the conductive support plate is arranged on the vibration plate.

[0034] In one embodiment, the conductive support is a FPCB pad attached to the vibration plate;

[0035] Or, the conductive support sheet is a conductive coating attached to the vibration plate;

[0036] Alternatively, the conductive support plate is a wire connected to the vibration plate, and the wire and the two voice coils are wound with one wire.

[0037] In one embodiment, there are two voice coils, one conductive support plate is located between the two voice coils, one common magnetic portion is located between the two central magnetic portions, and the conductive support plate is arranged opposite to the common magnetic portion along the vibration direction of the vibration system.

[0038] The present invention further provides an electronic device, which includes the sound-generating device described above.

[0039] The sound-generating device of the technical solution of the present invention is provided by accommodating a magnetic circuit system and a vibration system in a housing, and configuring the magnetic circuit system as a magnetic yoke and a side magnetic part, a common magnetic part and a central magnetic part arranged on the magnetic yoke, respectively arranging central magnetic parts on opposite sides of the common magnetic part, and annularly arranging the side magnetic parts on the outside of the common magnetic part and the central magnetic part, so that each central magnetic part and the side magnetic parts and the common magnetic parts arranged around it form a magnetic gap, and configuring the vibration system as a diaphragm assembly, a conductive support plate, at least two voice coils and four centering supports, so that the periphery of the diaphragm assembly is connected to the housing, and is arranged opposite to the magnetic circuit system. The invention relates to a method for manufacturing a plurality of voice coils, wherein the plurality of voice coils are arranged in parallel, and four centering supports are respectively arranged at four corners of the housing, and a plurality of voice coils are arranged side by side, so that one end of each voice coil is connected to the diaphragm assembly, and the other end of each voice coil is suspended in a magnetic gap, and in the direction in which the plurality of voice coils are arranged side by side, the voice coils at both ends are respectively connected to the corresponding two centering supports, and a conductive support is arranged on the side of the diaphragm assembly facing the magnetic circuit system and between two adjacent voice coils, so that the lead parts of the two adjacent voice coils are respectively electrically connected to the conductive support, so that the two adjacent voice coils are arranged in series, and thus current is passed through the plurality of voice coils, so that the plurality of voice coils are connected to each other. The coils are connected in series through conductive supports, and vibrate in the magnetic fields of multiple magnetic gaps formed by the magnetic circuit system respectively, and drive the diaphragm assembly to vibrate and produce sound, and at the same time, four centering supports are used in cooperation with the conductive supports to realize the centering effect on the multiple voice coils, so as to avoid polarization or swinging of the voice coils during the vibration process; at the same time, the conductive support is arranged on the side of the diaphragm assembly facing the magnetic circuit system and between two adjacent voice coils, and the number of the conductive support is set to be the same as the number of the shared magnetic parts, so that the conductive support and the shared magnetic parts are arranged one by one relative to each other along the vibration direction of the vibration system, and each conductive support is set to be connected The connecting portion and two pad portions arranged at both ends of the connecting portion make the two pad portions located at opposite sides of the connecting portion, and the connecting portion extends along the length direction of the common magnetic portion, and makes the projection of each connecting portion along the vibration direction of the vibration system located at the middle position of each common magnetic portion, which not only makes the lead portions of the two adjacent voice coils electrically connected to the conductive support pieces respectively, so that the two adjacent voice coils are arranged in series, but also cancels the centering support piece arranged on the long axis of the side magnetic portion, thereby further increasing the volume of the side magnetic portion, effectively improving the magnetic field strength, improving the product BL value, and then improving the loudness and sensitivity of the sound-emitting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] 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.

[0041] Figure 1A schematic structural diagram of an embodiment of a sound-generating device provided by the present invention;

[0042] Figure 2 A schematic structural diagram of another perspective of an embodiment of a sound-generating device provided by the present invention;

[0043] Figure 3 An exploded schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0044] Figure 4 It is a cross-sectional schematic diagram of a sound-generating device along the long axis direction in one embodiment of the present invention;

[0045] Figure 5 It is a cross-sectional schematic diagram of a sound-generating device along the minor axis direction in one embodiment of the present invention;

[0046] Figure 6 It is a cross-sectional schematic diagram of another viewing angle of the sound-generating device along the short axis direction in one embodiment of the present invention;

[0047] Figure 7 A partial structural schematic diagram of an embodiment of a magnetic circuit system provided by the present invention;

[0048] Figure 8 It is a schematic diagram of the structure of the connection between the vibration plate, the voice coil and the centering support plate in one embodiment of the present invention;

[0049] Fig. 9 A schematic structural diagram of another perspective of the connection between the vibration plate, the voice coil and the centering support plate in one embodiment of the present invention;

[0050] Fig.10 It is a schematic diagram of the structure of the connection between the housing, the side washers and the common washers in one embodiment of the present invention.

[0051] Description of Figure Numbers:

[0052] 100. Sounding device; 1. Shell; 11. Long axis side; 12. Short axis side; 13. Corner; 2. Magnetic circuit system; 21. Magnetic yoke; 22. Center magnetic part; 221. Center magnet; 222. Center washer; 23. Side magnetic part; 231. Side magnet; 2311. First side magnet; 2312. Second side magnet; 2313. Gap; 232. Side washer; 2321. First side washer; 2322. Second side washer; 233. Avoidance gap; 24. Common magnetic part; 241. Common magnet ; 242. Common washer; 243. Avoidance structure; 2431. First avoidance area; 2432. Second avoidance area; 25. Magnetic gap; 3. Vibration system; 31. Diaphragm assembly; 311. Diaphragm; 3111. Inner fixing part; 3112. Folding ring part; 3113. Outer fixing part; 312. Vibration plate; 32. Voice coil; 33. Centering support plate; 331. First fixing part; 332. Second fixing part; 333. Elastic arm; 34. Conductive support plate; 341. Connecting part; 342. Pad part.

[0053] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] It should be noted that 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.

[0056] 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.

[0057] 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.

[0058] The present invention provides a sound-generating device 100. It is understandable 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.

[0059] Please refer to Figures 1 to 10 As shown, in the embodiment of the present invention, the sound-generating device 100 includes a housing 1, a magnetic circuit system 2 and a vibration system 3, the magnetic circuit system 2 is connected to the housing 1, the magnetic circuit system 2 includes a magnetic yoke 21 and a side magnetic portion 23, a common magnetic portion 24 and a central magnetic portion 22 arranged on the magnetic yoke 21, the common magnetic portion 24 is provided with a central magnetic portion 22 on opposite sides, the side magnetic portion 23 is arranged on the outside of the common magnetic portion 24 and the central magnetic portion 22, each central magnetic portion 22 and the side magnetic portion 23 and the common magnetic portion 24 arranged around it form a magnetic gap 25, the vibration system 3 includes a diaphragm assembly 31, a conductive support plate 34, at least two voice coils 32 and four centering supports 33, the periphery of the diaphragm assembly 31 is connected to the housing 1 and is arranged opposite to the magnetic circuit system 2, the four centering supports 33 are respectively arranged at the four corners 13 of the housing 1, a plurality of voice coils 32 are arranged side by side, and one end of each voice coil 32 is connected to the vibration The membrane assembly 31, the other end of each voice coil 32 is suspended in a magnetic gap 25, along the direction in which the multiple voice coils 32 are arranged side by side, the voice coils 32 located at the two ends are respectively connected to the corresponding two centering support plates 33, the conductive support plate 34 is arranged on the side of the diaphragm assembly 31 facing the magnetic circuit system 2 and is located between the two adjacent voice coils 32, the lead parts of the two adjacent voice coils 32 are respectively electrically connected to the conductive support plates 34, so that the two adjacent voice coils 32 are arranged in series; wherein, the number of the conductive support plates 34 is the same as the number of the common magnetic parts 24, each conductive support plate 34 includes a connecting part 341 and two pad parts 342 arranged at both ends of the connecting part 341, the two pad parts 342 are located at opposite sides of the connecting part 341, the connecting part 341 extends along the length direction of the common magnetic part 24, and the projection of each connecting part 341 along the vibration direction of the vibration system 3 is located at the middle position of each common magnetic part 24.

[0060] 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 assembly 31 of the vibration system 3 are arranged relative to each other. Of course, in other embodiments, the diaphragm assembly 31 of the vibration system 3 can also be arranged on the periphery of the magnetic circuit system 2, which is not limited here.

[0061] 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 assembly 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 assembled on a housing or a module housing, etc., which is not limited here.

[0062] 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 Figures 1 to 6 , Fig.10 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 .

[0063] 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.

[0064] 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.

[0065] Specifically, the housing 1 is a rectangular frame, a receiving cavity is formed in the middle of the housing 1, and along the central axis direction, the housing 1 has a first side surface and a second side surface opposite to each other. The central axis direction of the housing 1 is the vibration direction of the sound-generating device 100. The magnetic circuit system 2 is connected to the first side surface of the housing 1, and the vibration system 3 is connected to the second side surface of the housing 1, so that the magnetic circuit system 2 and the vibration system 3 are arranged opposite to each other and can drive the vibration system 3 to vibrate and generate sound when the vibration system 3 is powered on.

[0066] In this embodiment, the periphery of the diaphragm assembly 31 of the vibration system 3 is connected to the outer shell 1, and is opposite to and spaced from the magnetic circuit system 2; or, the periphery of the diaphragm assembly 31 of the vibration system 3 is connected to the outer shell 1, and the center of the diaphragm assembly 31 is connected to the central magnetic portion 22 of the magnetic circuit system 2 and is opposite to the magnetic circuit system 2; or, the periphery of the diaphragm assembly 31 of the vibration system 3 is connected to the outer shell 1, and a through hole structure is provided in the center of the diaphragm assembly 31 for the magnetic circuit system 2 to pass through. At this time, the center of the diaphragm assembly 31 is connected to the side magnetic portion 23 of the magnetic circuit system 2 or the support member on the outer shell 1, which is not limited here.

[0067] 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.

[0068] 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.

[0069] It can be understood that by setting the magnetic circuit system 2 as a magnetic yoke 21 and a central magnetic portion 22, a side magnetic portion 23 and a common magnetic portion 24 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.

[0070] In this embodiment, a plurality of central magnetic portions 22 are provided, and a common magnetic portion 24 is provided between two adjacent central magnetic portions 22, that is, central magnetic portions 22 are provided on opposite sides of the common magnetic portion 24, and the side magnetic portions 23 are arranged on the outside of the common magnetic portion 24 and the central magnetic portion 22, so that each central magnetic portion 22 and the side magnetic portions 23 and the common magnetic portion 24 arranged around it form a magnetic gap 25, that is, two adjacent magnetic gaps 25 are located on opposite sides of the common magnetic portion 24, and each magnetic gap 25 is arranged around a central magnetic portion 22, so that the diaphragm assembly 31 of the vibration system 3 is connected to the housing 1, so that one end of the plurality of voice coils 32 is connected to the diaphragm assembly 31, and the other ends of the plurality of voice coils 32 are respectively arranged corresponding to the plurality of magnetic gaps 25.

[0071] Optionally, multiple voice coils 32 are arranged side by side. In order to realize the current passing through the multiple voice coils 32 and the electrical connection with the external circuit. In one embodiment, the vibration system 3 also includes a conductive support plate 34 and a centering support plate 33. The conductive support plate 34 is arranged on the side of the diaphragm assembly 31 facing the magnetic circuit system 2 and is located between two adjacent voice coils 32. The lead parts of the two adjacent voice coils 32 are respectively electrically connected to the conductive support plate 34, so that the two adjacent voice coils 32 are arranged in series. Along the direction in which the multiple voice coils 32 are arranged side by side, the voice coils 32 located at both ends are respectively connected to the corresponding two centering supports 33.

[0072] It can be understood that by arranging the conductive support 34 on the side of the diaphragm assembly 31 facing the magnetic circuit system 2 and between two adjacent voice coils 32, the lead parts of the two adjacent voice coils 32 are electrically connected to the conductive support 3, not only the two adjacent voice coils 32 are arranged in series, but also the centering support 33 arranged on the long axis of the edge magnetic part 23 is eliminated, thereby further increasing the volume of the edge magnetic part 23, effectively improving the magnetic field strength, improving the product BL value, and further improving the loudness and sensitivity of the sound-generating device 100. In addition, the four centering supports 33 cooperate with the conductive support 34 to achieve the centering effect on the multiple voice coils 32, avoiding the phenomenon of polarization or swinging of the voice coils 32 during the vibration process, and further improving the acoustic performance of the sound-generating device 100.

[0073] In this embodiment, if Figure 3 , Figure 8 and Fig. 9 As shown, the centering support plate 33 includes a first fixing portion 331, a second fixing portion 332 and an elastic arm 333 connected between the first fixing portion 331 and the second fixing portion 332. The first fixing portion 331 is connected to the housing 1, and the second fixing portion 332 is connected to the voice coil 32 and electrically connected to the lead of the voice coil 32.

[0074] In one embodiment, each conductive support piece 34 includes a connecting portion 341 and two pad portions 342 provided at both ends of the connecting portion 341, the two pad portions 342 are located on opposite sides of the connecting portion 341, the connecting portion 341 extends along the length direction of the common magnetic portion 24, and the projection of each connecting portion 341 along the vibration direction of the vibration system 3 is located at the middle position of each common magnetic portion 24.

[0075] In this embodiment, if Figure 3 and Fig. 9 As shown, the connecting portion 341 and the two pad portions 342 of the conductive support 34 can be an integrally formed structure. The two pad portions 342 are provided at both ends of the connecting portion 341, and the two pad portions 342 are located on opposite sides of the connecting portion 341, and the lead portions of the two adjacent voice coils 32 are respectively connected to the two pad portions 342. Optionally, the connecting portion 341 extends along the length direction of the common magnetic portion 24.

[0076] Optionally, the central axis of the connecting portion 341 along the short axis side 12 coincides with the central axis of the common magnetic portion 24 along the short axis side 12. Optionally, the central axis of the connecting portion 341 along the long axis side 11 coincides with the central axis of the long axis of the voice coil 32. It can be understood that this ensures that the conductive support 34 is located in the middle of the common magnetic portion 24, thereby achieving centering and balancing effects on the two adjacent voice coils 32.

[0077] In one embodiment, if Figure 3 , Figure 5 , Figure 7 , Fig. 9 and Fig.10 As shown, the projection of the connection portion 341 of the conductive support 34 along the vibration direction of the vibration system 3 is located at the middle position of the common magnetic portion 24. It can be understood that the arrangement of the conductive support 34 can not only realize the serial connection and conduction of the two adjacent voice coils 32, but also play a centering role for the two adjacent voice coils 32, ensuring that the wiring distance between the two adjacent voice coils 32 and the conductive support 34 is basically consistent, so that the pulling force on the two adjacent voice coils 32 can be basically consistent, which can further avoid the polarization problem of the voice coil 32 during the vibration process.

[0078] It can be understood that the electrical connection between the voice coils 32 at both ends of the multiple voice coils 32 in the direction of the parallel arrangement and the external circuit is connected and conducted through the centering support 33, and the multiple voice coils 32 are connected in series through the conductive support 34, so as to pass current into the multiple voice coils 32. Optionally, the conductive support 34 includes multiple. In this embodiment, the number of voice coils 32 is N, N≥2, and the number of conductive support 34 is N-1. In this embodiment, the centering support 33 can be set at the bottom of the voice coil 32, and four centering support 33 are located at the four corners of the sound-generating device 100.

[0079] Of course, in other embodiments, in order to realize the electrical connection between the voice coil 32 and the external circuit, the vibration system 3 also includes a connector or a skeleton, one end of the connector or the skeleton is connected to the voice coil 32 and is connected and conducted with the lead of the voice coil 32, and the other end of the connector or the skeleton is connected to the housing 1, which is not limited here.

[0080] Optionally, when the number of voice coils 32 is N, the number of central magnetic parts 22 is N, and the number of common magnetic parts 24 is N-1.

[0081] In one embodiment, if Figure 3 , Figure 4 , Figure 7 and Fig. 9As shown, two voice coils 32 may be selected, one conductive support plate 34 may be selected and located between the two voice coils 32, four centering support plates 33 may be selected, one common magnetic portion 24 may be selected and located between the two center magnetic portions 22, and the conductive support plate 34 is arranged opposite to the common magnetic portion 24 along the vibration direction of the vibration system 3.

[0082] In this embodiment, by setting two central magnetic parts 22, and setting each central magnetic part 22 as a stacked central magnet 221 and a central washer 222, and setting the side magnetic parts 23 and the common magnetic part 24 around or outside each central magnetic part 22, the two central magnetic parts 22 share a common magnetic part 24 and form two magnetic gaps 25, 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. In addition, four centering support plates 33 are respectively arranged at the four corners of the shell 1, and the conductive support plate 34 is arranged on the side of the diaphragm assembly 31 facing the magnetic circuit system 2 and between two adjacent voice coils 32. In addition, along the vibration direction of the vibration system 3, the conductive support plates 34 and the common magnetic part 24 are arranged one by one opposite to each other, which not only makes the lead parts of the two adjacent voice coils 32 electrically connected to the conductive support plates 34 respectively, so as to realize the series arrangement of the two adjacent voice coils 32, but also eliminates the need to arrange the centering support plate 33 on the long axis of the side magnetic part 23, thereby further increasing the volume of the side magnetic part 23, effectively improving the magnetic field strength, and improving the product BL value, thereby improving the loudness and sensitivity of the sound-emitting device 100.

[0083] Optionally, the magnetic yoke 21 of the magnetic circuit system 2 is a flat plate structure, and the common magnetic portion 24 , the central magnetic portion 22 and the side magnetic portion 23 are all bar-shaped and fixed to the side of the magnetic yoke 21 facing the vibration system 3 .

[0084] In this embodiment, the periphery of the diaphragm assembly 31 of the vibration system 3 is connected to the second side of the housing 1; two voice coils 32 are arranged in a row in the receiving cavity, and the first end of each voice coil 32 is connected to the diaphragm assembly 31, and the other end is arranged corresponding to the magnetic circuit system 2, so that when powered on, it is driven by the magnetic circuit system 2 and then drives the diaphragm assembly 31 to vibrate and produce sound. Four centering support pieces 33 are respectively arranged at the four corners 13 of the housing 1, and each centering support piece 33 is connected between the corner 13 of the first side of the housing 1 and the voice coil 32 of the corresponding corner 13, so that the polarization of the two voice coils 32 in the non-vibration direction can be reduced. At the same time, the conductive support piece 34 is located between the two voice coils 32 and is specifically arranged on the diaphragm assembly 31, and the conductive support piece 34 is electrically connected to the lead parts of the two voice coils 32 respectively. In this way, not only the series arrangement of the two voice coils 32 is realized, but also the conductive support piece 34 is used to achieve a centering effect on the two adjacent voice coils 32, that is, the conductive support piece 34 cooperates with the four centering support pieces 33 at the four corners 13 to achieve a centering effect on the voice coil 32, thereby avoiding polarization or swinging of the voice coil 32 during vibration, thereby improving the sound quality effect of the sound-generating device 100.

[0085] In one embodiment, the diaphragm assembly 31 has two long axis sides and two short axis sides connected end to end, and the two central magnetic portions 22 are arranged at intervals along the direction of the long axis sides.

[0086] In this embodiment, if Figure 1 , Figure 3 , Figure 8 and Fig. 9 As shown, the diaphragm assembly 31 may be arranged in a rectangular shape, that is, the diaphragm assembly 31 has two long axis sides and two short axis sides connected end to end. Optionally, the two central magnetic parts 22 are arranged at intervals along the direction of the long axis side, that is, the two magnetic gaps 25 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.

[0087] The sound-generating device 100 of the present invention is provided by accommodating the magnetic circuit system 2 and the vibration system 3 in the housing 1, and configuring the magnetic circuit system 2 to be a magnetic yoke 21 and a side magnetic portion 23, a common magnetic portion 24 and a central magnetic portion 22 provided on the magnetic yoke 21, respectively providing a central magnetic portion 22 on opposite sides of the common magnetic portion 24, and configuring the side magnetic portion 23 to be annularly arranged on the outside of the common magnetic portion 24 and the central magnetic portion 22, so that each central magnetic portion 22 and the side magnetic portions 23 and the common magnetic portion 24 provided around it enclose a magnetic gap 25, and configuring the vibration system 3 to be a diaphragm assembly 31, a conductive support plate 34, at least two voice coils 32 and four centering support plates 33, so that the periphery of the diaphragm assembly 31 is connected to the outer The housing 1 is provided with four centering supports 33 respectively at the four corners 13 of the housing 1, and a plurality of voice coils 32 are arranged side by side, so that one end of each voice coil 32 is connected to the diaphragm assembly 31, and the other end of each voice coil 32 is suspended in a magnetic gap 25, and in the direction in which the plurality of voice coils 32 are arranged side by side, the voice coils 32 at both ends are respectively connected to the corresponding two centering supports 33, and a conductive support 34 is provided on the side of the diaphragm assembly 31 facing the magnetic circuit system 2 and between two adjacent voice coils 32, so that the lead parts of the two adjacent voice coils 32 are respectively electrically connected to the conductive support 34, so that the two adjacent voice coils 32 are arranged in series, so that Current is passed through the multiple voice coils 32, so that the multiple voice coils 32 are connected in series through the conductive support plates 34, and respectively vibrate in the magnetic fields of the multiple magnetic gaps 25 formed by the magnetic circuit system 2 and drive the diaphragm assembly 31 to vibrate and produce sound, and at the same time, four centering support plates 33 are used in cooperation with the conductive support plates 34 to achieve a centering effect on the multiple voice coils 32, so as to avoid polarization or swinging of the voice coils 32 during the vibration process; at the same time, the conductive support plates 34 are arranged on the side of the diaphragm assembly 31 facing the magnetic circuit system 2 and between two adjacent voice coils 32, and the number of the conductive support plates 34 is set to be the same as the number of the common magnetic parts 24, so that the conductive support plates 34 and the common magnetic parts 24 are aligned in the vibration direction of the vibration system 3. They are arranged one by one opposite to each other, and each conductive support piece 34 is arranged as a connecting part 341 and two soldering pad parts 342 arranged at both ends of the connecting part 341, so that the two soldering pad parts 342 are located on opposite sides of the connecting part 341, and the connecting part 341 extends along the length direction of the common magnetic part 24, and the projection of each connecting part 341 along the vibration direction of the vibration system 3 is located at the middle position of each common magnetic part 24, which not only realizes the series connection of two adjacent voice coils 32, but also eliminates the need to set the centering support piece 33 on the long axis of the side magnetic part 23, thereby further increasing the volume of the side magnetic part 23, effectively improving the magnetic field strength, improving the product BL value, and then improving the loudness and sensitivity of the sound-emitting device 100.

[0088] In one embodiment, the housing 1 has two long-axis sides 11 and two short-axis sides 12 connected end to end, and the connection between the long-axis sides 11 and the short-axis sides 12 forms a corner 13; a plurality of voice coils 32 are arranged at intervals along the extension direction of the long-axis sides 11, and the extension direction of the common magnetic portion 24 is consistent with the extension direction of the short-axis sides 12, and is located between two adjacent voice coils 32.

[0089] In this embodiment, if Figure 3 and Fig.10 As shown, the housing 1 may be optionally a rectangular frame structure, and a plurality of voice coils 32 may be optionally arranged at intervals along the extension direction of the long axis side 11 of the housing 1, that is, a plurality of central magnetic portions 22 may be arranged at intervals along the extension direction of the long axis side 11 of the housing 1. At this time, a common magnetic portion 24 is arranged between two adjacent central magnetic portions 22, that is, the extension direction of the common magnetic portion 24 is consistent with the extension direction of the short axis side 12, and is located between two adjacent voice coils 32.

[0090] It can be understood that the housing 1 is a rectangular frame, so that the sound-generating device 100 forms a rectangular structure. Of course, in other embodiments, the sound-generating device 100 can also form other shapes, such as a square or other polygons, which are not limited here.

[0091] In order to facilitate the installation of the centering support piece 33 and avoid interference between the centering support piece 33 and the edge magnet part 23, in one embodiment, the edge magnet part 23 is provided with an escape notch 233 connected to the magnetic gap 25 corresponding to each corner part 13, each centering support piece 33 is provided corresponding to an escape notch 233, and one end of each centering support piece 33 is connected to the corner part 13, and the other end of each centering support piece 33 extends into the magnetic gap 25 and is connected to the voice coil 32.

[0092] In this embodiment, if Figure 3 and Figure 7 As shown, by providing an escape notch 233 connected to the magnetic gap 25 on the edge magnetic part 23, the escape notch 233 can be conveniently used to provide an escape space and a vibration space for the centering support piece 33. It can be understood that the edge magnetic part 23 is provided with an escape notch 233 corresponding to each corner 13, so that each centering support piece 33 is provided with an escape notch 233, and one end of each centering support piece 33 is connected to the corner 13, and the other end of each centering support piece 33 extends into the magnetic gap 25 and is connected to the voice coil 32.

[0093] Optionally, the edge magnetic parts 23 include multiple edge magnetic parts 23, which are arranged around the outer sides of the central magnetic part 22 and the common magnetic part 24, and adjacent edge magnetic parts 23 are spaced to form gaps. At this time, the gap corresponding to the corner 13 of the shell 1 forms an avoidance gap 233.

[0094] In this embodiment, if Figure 3 and Figure 7As shown, the plurality of edge magnet portions 23 include edge magnet portions 23 extending along the long axis side 11 and edge magnet portions 23 extending along the short axis side 12 . At this time, adjacent edge magnet portions 23 are spaced apart to form avoidance gaps 233 corresponding to the corner portions 13 , which are not limited here.

[0095] It can be understood that the edge magnetic portion 23 can be optionally arranged in a rectangular frame, the edge magnetic portion 23 has two long sides and two short sides, the two central magnetic portions 22 are arranged at intervals along the long sides, the first part of the edge magnetic portion 23 is the two short sides, the second part of the edge magnetic portion 23 is the two long sides, and the common magnetic portion 24 is located between the two short sides, parallel to the short sides, and perpendicular to the long sides, so that the edge magnetic portion 23 is divided into two rectangular cavities by the common magnetic portion 24.

[0096] Optionally, each corner of the edge magnet portion 23 is provided with an escape notch 233, that is, an escape notch 233 is provided between the long side and the short side. In this way, the escape notch 233 at the corner of the edge magnet portion 23 can be used to provide installation and escape space for the centering support piece 33.

[0097] In one embodiment, the edge magnet portion 23 includes a stacked edge magnet 231 and an edge washer 232, and the edge magnet 231 is connected to the magnetic yoke 21. The edge magnet 231 and the edge washer 232 of the edge magnet portion 23 are arranged around the outside of the central magnetic portion 22 and the common magnetic portion 24. It can be understood that the avoidance gap 233 can be formed by the edge magnet 231 and / or the edge washer 232 of the edge magnet portion 23, which is not limited here.

[0098] Optionally, the edge magnet 231 of the edge magnet part 23 can be a permanent magnet. The edge washer 232 can be a magnetic plate structure. It can be understood that the edge magnet 231 and the edge washer 232 of the edge magnet part 23 can be an integrated structure or a split structure, which is not limited here.

[0099] In this embodiment, if Figure 3 and Figure 7 As shown, the edge magnet 231 includes a first edge magnet 2311 extending along the long axis side 11 and a second edge magnet 2312 extending along the short axis side 12, and the edge washer 232 includes a first edge washer 2321 extending along the long axis side 11 and a second edge washer 2322 extending along the short axis side 12, the first edge washer 2321 corresponds to the first edge magnet 2311, and the second edge washer 2322 corresponds to the second edge magnet 2312.

[0100] Optionally, a first gap is formed between adjacent first side magnets 2311 and second side magnets 2312, a second gap is formed between adjacent first side washers 2321 and second side washers 2322, and the first gap and the second gap are correspondingly connected to form an avoidance gap 233. In this embodiment, the first gap formed between the first side magnet 2311 and the second side magnet 2312 of the side magnet 231 and the second gap formed between the first side washer 2321 and the second side washer 2322 of the side washer 232 are correspondingly connected, and are arranged corresponding to the corner 13 of the housing 1.

[0101] In one embodiment, the side magnet 231 includes two first side magnets 2311, and each first side magnet 2311 is arranged corresponding to a long axis side 11. It can be understood that the first side magnet 2311 can be optionally arranged in a strip shape and extended along the length direction of the long axis side 11. Thus, the structural design of the side magnet part 23 can be made simpler and the assembly can be more convenient.

[0102] Optionally, the common magnetic portion 24 is vertically arranged to the two first side magnets 2311 and corresponds to the center position of the two first side magnets 2311 .

[0103] In another embodiment, the number of voice coils 32 can be selected as N, N≥2, and the side magnet 231 includes 2N first side magnets 2311, each N first side magnets 2311 corresponds to a long axis side 11, and are arranged at intervals along the extension direction of the long axis side 11, so that a gap 2313 is formed between two adjacent first side magnets 2311, the gap 2313 is opposite to the common magnetic portion 24, and the width of the gap 2313 along the extension direction of the long axis side 11 is smaller than the width of the common magnetic portion 24 along the extension direction of the long axis side 11.

[0104] It can be understood that each long axis side 11 corresponds to N first side magnets 2311, and the N first side magnets 2311 are arranged adjacently or at intervals along the length direction of the long axis side 11. Optionally, each long axis side 11 corresponds to two first side magnets 2311, and the two first side magnets 2311 are arranged at intervals along the extension direction of the long axis side 11, so that a gap 2313 is formed between the two first side magnets 2311. In this embodiment, the gap 2313 is opposite to the common magnetic part 24. Optionally, the width of the gap 2313 along the extension direction of the long axis side 11 is smaller than the width of the common magnetic part 24 along the extension direction of the long axis side 11. Such a setting can not only ensure the smoothness of the airflow, but also reduce the space reserved by the side magnetic part 23 for the original centering support plate 33, thereby increasing the volume of the side magnet 231 of the side magnetic part 23, thereby increasing the magnetic field strength, improving the product BL value, and improving the acoustic performance.

[0105] In one embodiment, the side magnet 231 includes a second side magnet 2312 corresponding to each short axis side 12, and each second side magnet 2312 and the common magnetic portion 24 are located on opposite sides of the central magnetic portion 22. It can be understood that each second side magnet 2312 is corresponding to a short axis side 12, and the second side magnet 2312 can be optionally arranged in a strip shape and extended along the length direction of the short axis side 12.

[0106] In another embodiment, the side magnet 231 includes a plurality of second side magnets 2312 corresponding to each short axis side 12, and the plurality of second side magnets 2312 corresponding to each short axis side 12 are arranged adjacent to each other along the extension direction of the short axis side 12. It can be understood that each short axis side 12 corresponds to a plurality of second side magnets 2312, and the plurality of second side magnets 2312 are arranged adjacent to each other or at intervals along the length direction of the short axis side 12.

[0107] Optionally, the first side washers 2321 corresponding to each long axis side 11 include one or more, which is not limited here. Optionally, the second side washers 2322 corresponding to each short axis side 12 include one or more, which is not limited here.

[0108] In order to facilitate the processing of the side washer 232, in this embodiment, the first side washer 2321 and the second side washer 2322 of the side washer 232 are an integrally formed structure. In order to further simplify the processing steps, in one embodiment, the first side washer 2321 and the second side washer 2322 of the side washer 232 are integrally injection molded with the housing 1. It can be understood that the housing 1 can be selected as a plastic part, the side washer 232 can be selected as a metal magnetic conductive plate, and the housing 1 and the side washer 232 are integrally injection molded, which can ensure structural stability and simplify processing steps.

[0109] In one embodiment, the common magnetic portion 24 is provided with a avoidance structure 243 corresponding to the conductive support piece 34. It can be understood that Figures 3 to 5 , Figure 7 and Fig. 9 As shown, setting the conductive support plate 34 in the vibration system 3 will increase the thickness of the diaphragm assembly 31 accordingly. By setting the avoidance structure 243 in the common magnetic part 24, the avoidance structure 243 is utilized to provide an avoidance space for the conductive support plate 34 when the diaphragm assembly 31 vibrates, thereby effectively reducing the occupation of the vibration space by the increased thickness, thereby ensuring the vibration space of the vibration system 3.

[0110] Optionally, the avoidance structure 243 is a groove formed by the common magnetic part 24 being recessed toward the magnetic guide yoke 21. Of course, in other embodiments, the avoidance structure 243 may be a through-hole structure penetrating the common magnetic part 24, which is not limited here.

[0111] In one embodiment, the common magnetic portion 24 includes a common magnet 241 and a common washer 242 which are stacked, and the common magnet 241 is connected to the magnetically conductive yoke 21 .

[0112] Understandable, such as Figure 3 , Figure 7 and Fig.10 As shown, the outer contours of the common magnet 241 and the common washer 242 of the common magnetic part 24 are the same. In this embodiment, the outer contours of the central magnet 221 and the central washer 222 of the central magnetic part 22 are the same, and the outer contours of the side magnet 231 and the side washer 232 of the side magnetic part 23 in the long axis direction are basically the same, and two adjacent side washers 232 are connected so that the plurality of side washers 232 form an annular structure with the same outer contour as the housing 1, and the plurality of side washers 232 arranged in one piece are connected to the first side surface of the housing 1 through the side surface away from the magnetic yoke 21.

[0113] Optionally, the housing 1 is a metal housing. In this embodiment, the housing 1 and the edge washer 232 of the edge magnetic portion 23 can be integrally stamped or machined, which is conducive to heat dissipation and thus improves service life.

[0114] In one embodiment, the edge magnet portion 23 includes a stacked edge magnet 231 and an edge washer 232, wherein the edge magnet 231 is connected to the magnetic yoke 21; wherein the common washer 242 and the edge washer 232 are an integrally formed structure. It can be understood that such an arrangement can make the edge washer 232 of the edge magnet portion 23 and the common washer 242 of the common magnet portion 24 an integrally formed structure, thereby improving processing efficiency and ensuring structural strength.

[0115] In this embodiment, if Figure 3 and Fig.10 As shown, the common washer 242 and the first side washer 2321 and the second side washer 2322 of the side washer 232 are an integral one-piece structure, and thus are integrally injection molded with the housing 1 as an integral component.

[0116] In one embodiment, the avoidance structure 243 includes a first avoidance area 2431 and a second avoidance area 2432 that are connected to each other. The first avoidance area 2431 is a groove formed by the common washer 242 being recessed toward the common magnet 241, and the second avoidance area 2432 is a through hole structure or a notch that sequentially passes through the common washer 242 and the common magnet 241; wherein the connecting portion 341 corresponds to the first avoidance area 2431, and each pad portion 342 corresponds to a second avoidance area 2432.

[0117] In this embodiment, if Figure 3 , Figure 5 , Figure 7 and Fig.10As shown, by setting the avoidance structure 243 as a first avoidance area 2431 and a second avoidance area 2432 that are connected, the first avoidance area 2431 is a groove formed by the common washer 242 being recessed toward the common magnet 241, and the second avoidance area 2432 is a through hole structure or a notch that sequentially passes through the common washer 242 and the common magnet 241. In this way, the structural strength and magnetic field strength of the common magnetic part 24 can be ensured, and avoidance space can be provided for the conductive support plate 34.

[0118] It can be understood that the connection portion 341 of the conductive support 34 corresponds to the first avoidance area 2431, and each pad portion 342 corresponds to a second avoidance area 2432. Such a configuration can provide sufficient avoidance space for the pad portion 342 and the lead portion of the voice coil 32 using the second avoidance area 2432, and the first avoidance area 2431 can avoid the connection portion 341 without affecting the structural strength and magnetic field strength of the common magnetic portion 24. Optionally, the connection portion 341 extends along the length direction of the common magnetic portion 24.

[0119] In one embodiment, the diaphragm assembly 31 includes a diaphragm 311 and a vibration plate 312. The diaphragm 311 includes an inner fixing portion 3111, a folding ring portion 3112 and an outer fixing portion 3113 which are sequentially connected from the inside to the outside. The inner fixing portion 3111 is connected to the vibration plate 312, the outer fixing portion 3113 is connected to the outer shell 1, and the conductive support plate 34 is arranged on the vibration plate 312.

[0120] In this embodiment, if Figure 1 , Figures 3 to 6 , Figure 8 and Fig. 9 As shown, by setting the diaphragm assembly 31 as a two-part structure of a diaphragm 311 and a vibration plate 312, the diaphragm 311 is formed into a ring structure, and the vibration plate 312 is optionally bonded to the inner fixing portion 3111 of the diaphragm 311. Optionally, the inner fixing portion 3111, the folding ring portion 3112 and the outer fixing portion 3113 of the diaphragm 311 are an integrally formed structure.

[0121] It can be understood that the inner fixing portion 3111 and the outer fixing portion 3113 of the diaphragm 311 have a relative displacement in the direction of the central axis thereof through the folding ring portion 3112, and because the inner fixing portion 3111 is connected to the vibration plate 312, and the outer fixing portion 3113 is connected to the second side surface of the housing 1, the vibration plate 312 and the housing 1 have a relative displacement in the vibration direction. The outer periphery of the outer fixing portion 3113 is also provided with a flange bent toward one side of the housing 1, so that the connection strength with the housing 1 can be further improved.

[0122] In this embodiment, the range of the deformation area in the diaphragm 311 can be increased by setting the folding ring portion 3112, thereby increasing the relative position of the diaphragm 311 in the vibration direction. Optionally, the folding ring portion 3112 is a convex structure that bulges upward or a concave structure that is concave downward, which is not limited here. The folding ring portion 3112 in this embodiment is concave to one side, which can reduce the height of the diaphragm 311 in the vibration direction, thereby correspondingly reducing the thickness of the diaphragm assembly 31 and the sound-generating device 100. The folding ring portion 3112 is concavely arranged toward one side of the magnetic circuit system 2, which can avoid interference between the diaphragm 311 and the housing 1 when the diaphragm 311 vibrates.

[0123] In one embodiment, the vibration plate 312 is connected to the side of the inner fixing portion 3111 facing the magnetic circuit system 2, and the two voice coils 32 are connected to the vibration plate 312; a protrusion is also provided on the vibration plate 312. It can be understood that by providing the protrusion on the vibration plate 312, the strength of the vibration plate 312 can be improved, thereby ensuring the performance of the sound generating device 100.

[0124] In one embodiment, the conductive support sheet 34 is a FPCB pad or a conductive coating attached to the vibration plate 312. This can increase the structural diversity of the conductive support sheet 34 and thus provide wider practicality.

[0125] Optionally, the conductive support sheet 34 is made of FPCB material. Of course, in other embodiments, the conductive support sheet 34 may also be a conductive coating or conductive glue coated on the vibration plate 312, which is not limited here.

[0126] In one embodiment, the conductive support plate 34 is a wire connected to the vibration plate 312, and the wire and the two voice coils 32 are wound with a single wire. This simplifies the connection structure between adjacent voice coils 32 and reduces the two lead weldings of the two voice coils 32, thereby reducing the assembly process of the sound-generating device 100 and improving the assembly efficiency of the sound-generating device 100.

[0127] 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.

[0128] 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.

[0129] In this embodiment, the electronic device further includes a flexible circuit board, one end of which is electrically connected to the sound 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 voice coil 32 of the sound 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 device 100, and the outer pad of the flexible circuit board is used to connect to an external terminal.

[0130] 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.

[0131] 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.

[0132] 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: shell; A magnetic circuit system, the magnetic circuit system is connected to the housing, the magnetic circuit system includes a magnetic yoke and side magnetic parts, a common magnetic part and a central magnetic part arranged on the magnetic yoke, the central magnetic parts are respectively arranged on opposite sides of the common magnetic part, the side magnetic parts are arranged around the outside of the common magnetic part and the central magnetic part, and each of the central magnetic parts and the side magnetic parts and the common magnetic parts arranged around it form a magnetic gap; and A vibration system, wherein the vibration system comprises a diaphragm assembly, a conductive support, at least two voice coils and four centering supports, wherein the periphery of the diaphragm assembly is connected to the housing and arranged opposite to the magnetic circuit system, the four centering supports are respectively arranged at the four corners of the housing, the plurality of voice coils are arranged side by side, one end of each voice coil is connected to the diaphragm assembly, the other end of each voice coil is suspended in a magnetic gap, the voice coils at both ends along the direction in which the plurality of voice coils are arranged side by side are respectively connected to the corresponding two centering supports, the conductive support is arranged on the side of the diaphragm assembly facing the magnetic circuit system and between two adjacent voice coils, the lead portions of the two adjacent voice coils are respectively electrically connected to the conductive supports, so that the two adjacent voice coils are arranged in series; The number of the conductive support pieces is the same as the number of the common magnetic parts, each of the conductive support pieces includes a connecting part and two pad parts arranged at both ends of the connecting part, the two pad parts are located on opposite sides of the connecting part, the connecting part extends along the length direction of the common magnetic part, and the projection of each of the connecting parts along the vibration direction of the vibration system is located in the middle position of each of the common magnetic parts.

2. The sound-generating device according to claim 1, characterized in that: The shell has two long axis sides and two short axis sides connected end to end, and the connection between the long axis sides and the short axis sides forms the corner; The plurality of voice coils are arranged at intervals along the extension direction of the long axis, the extension direction of the common magnetic portion is consistent with the extension direction of the short axis, and is located between two adjacent voice coils.

3. The sound-generating device according to claim 2, characterized in that: The central axis of the connecting portion along the short axis side coincides with the central axis of the common magnetic portion along the short axis side; And / or, a central axis of the connecting portion along the long axis side coincides with a central axis of the long axis of the voice coil.

4. The sound generating device according to claim 2, characterized in that: The side magnet part is provided with an avoidance gap connected to the magnetic gap corresponding to each of the corners, and each of the centering support pieces is provided corresponding to one of the avoidance gaps, and one end of each of the centering support pieces is connected to the corner, and the other end of each of the centering support pieces extends into the magnetic gap and is connected to the voice coil.

5. The sound generating device according to claim 4, characterized in that: The edge magnet part includes a stacked edge magnet and an edge washer, and the edge magnet is connected to the magnetic yoke; The side magnets include a first side magnet extending along the long axis and a second side magnet extending along the short axis, and the avoidance gap is formed between the adjacent first side magnets and the second side magnets; The side washer includes a first side washer extending along the long axis and a second side washer extending along the short axis. The first side washer corresponds to the first side magnet, and the second side washer corresponds to the second side magnet.

6. The sound generating device according to claim 5, characterized in that: The side magnet includes two first side magnets, each of which is arranged corresponding to one of the long axis sides; Or, the number of the voice coils is N, N≥2, and the side magnets include 2N first side magnets, each N first side magnets correspond to one of the long axis sides, and are arranged at intervals along the extension direction of the long axis side, so that a gap is formed between two adjacent first side magnets, the gap is opposite to the common magnetic part, and the width of the gap along the extension direction of the long axis side is smaller than the width of the common magnetic part along the extension direction of the long axis side.

7. The sound generating device according to claim 5, characterized in that: The side magnet includes one second side magnet arranged corresponding to each of the short axis sides, and each of the second side magnets and the common magnetic portion are located on opposite sides of the central magnetic portion; or, the side magnet includes a plurality of second side magnets arranged corresponding to each of the short axis sides, and the plurality of second side magnets arranged corresponding to each of the short axis sides are arranged adjacent to each other along the extension direction of the short axis sides; and / or, the avoidance gap is formed between the adjacent first side washers and the second side washers; And / or, the first side washer and the second side washer are integrally injection molded with the housing; And / or, the first side washers corresponding to each of the long axis sides include one or more; And / or, the second side washers corresponding to each of the short-axis sides include one or more.

8. The sound generating device according to claim 1, characterized in that: The common magnetic part is provided with a avoidance structure corresponding to the conductive support sheet; Wherein, the avoidance structure is a groove formed by the common magnetic part being recessed toward the magnetic yoke; or, the avoidance structure is a through-hole structure penetrating the common magnetic part.

9. The sound-generating device according to claim 8, characterized in that: The common magnetic part includes a common magnet and a common washer which are stacked, and the common magnet is connected to the magnetic yoke; The avoidance structure comprises a first avoidance area and a second avoidance area which are connected to each other, wherein the first avoidance area is a groove formed by the common washer being recessed toward the common magnet, and the second avoidance area is a through hole structure or a gap which sequentially penetrates the common washer and the common magnet; The connecting portion corresponds to the first avoidance area, and each of the pad portions corresponds to a second avoidance area.

10. The sound generating device according to claim 9, characterized in that: The edge magnet part includes a stacked edge magnet and an edge washer, and the edge magnet is connected to the magnetic yoke; Wherein, the common washer and the side washer are an integrally formed structure.

11. The sound generating device according to any one of claims 1 to 10, characterized in that: The diaphragm assembly includes a diaphragm and a vibration plate. The diaphragm includes an inner fixing portion, a folding ring portion and an outer fixing portion which are sequentially connected from the inside to the outside. The inner fixing portion is connected to the vibration plate, the outer fixing portion is connected to the outer shell, and the conductive support plate is arranged on the vibration plate.

12. The sound generating device according to claim 11, characterized in that: The conductive support sheet is a FPCB pad attached to the vibration plate; Or, the conductive support sheet is a conductive coating attached to the vibration plate; Alternatively, the conductive support plate is a wire connected to the vibration plate, and the wire and the two voice coils are wound with one wire.

13. The sound generating device according to any one of claims 1 to 10, characterized in that: There are two voice coils, one conductive support plate located between the two voice coils, one common magnetic part located between the two central magnetic parts, and the conductive support plate is arranged opposite to the common magnetic part along the vibration direction of the vibration system.

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

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