Sound production device and electronic equipment

Abstract

The utility model discloses a sounding device and an electronic device, and relates to the technical field of electroacoustic transduction, a magnetic circuit system of the sounding device comprises a magnetic conductive yoke, side magnetic parts, a common magnetic part and central magnetic parts, each central magnetic part and the side magnetic part and the common magnetic part which are arranged around the central magnetic part are enclosed to form a magnetic gap, the vibration system comprises a vibrating 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 two ends are respectively connected with the corresponding two centering support chips along the side-by-side direction of the plurality of voice coils, lead parts of two adjacent voice coils are respectively and electrically connected with the conductive support chip, and the conductive support chip is electrically connected with the conductive support chip. The two adjacent voice coils are arranged in series; the number of the conductive support chips is the same as that of the common magnetic parts, and the conductive support chips and the common magnetic parts are oppositely arranged. According to the sounding 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 the sensitivity of the sounding device are further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electroacoustic transduction, in particular to a sound production device and electronic equipment applying the same. BACKGROUND

[0002] In recent years, with the rapid development of consumer electronics, smart phones, VR devices and other electronic equipment have been recognized by consumers and widely applied. Related supporting products such as earphones have also been improved by those skilled in the art to meet the performance requirements of electronic products and meet the needs of consumers for product performance.

[0003] The sound production device is an important electroacoustic transduction component in consumer electronics, which is widely used as a loudspeaker, a receiver, an earphone, etc. With the improvement of the performance of electronic products, the improvement of the acoustic performance of the sound production device is also an inevitable trend. In order to meet better acoustic performance, the sound production device often needs to be configured with a larger size and a stronger magnetic field strength magnetic circuit system.

[0004] In related technologies, multiple voice coils are usually used to improve the acoustic performance of the sound production device, and a centering support structure is used, and the centering support is arranged on the four corners of the sound production device and the long axis of the sound production device to connect the four corners of the voice coil, thereby occupying the space of the magnetic circuit system, resulting in that the size of the edge magnet of the magnetic circuit system is limited and cannot be increased, especially the space occupied on the long axis of the edge magnet is larger, thereby reducing the magnetic field strength of the magnetic circuit system, reducing the BL value, and affecting the acoustic performance of the sound production device. SUMMARY

[0005] The main purpose of the utility model is to provide a sound production device and electronic equipment, which aims to provide a sound production device that effectively increases the magnetic field strength of the magnetic circuit system, which can increase the volume of the magnet in the magnetic circuit system, effectively improve the magnetic field strength, improve the BL value of the product, and thus improve the loudness and sensitivity of the sound production device.

[0006] To achieve the above purpose, the utility model provides a sound production device, which comprises:

[0007] a shell;

[0008] a magnetic circuit system connected to the shell, the magnetic circuit system comprising a magnetic yoke, a side magnetic portion, a common magnetic portion and a center magnetic portion provided on the magnetic yoke, the common magnetic portion having the center magnetic portion on opposite sides thereof, the side magnetic portion being annularly arranged outside the common magnetic portion and the center magnetic portion, and each center magnetic portion and the side magnetic portion and the common magnetic portion provided around it forming a magnetic gap; and

[0009] A vibration system comprises a diaphragm assembly, a conductive branch, at least two voice coils and four centering branches, a periphery of the diaphragm assembly is connected to the shell and is arranged opposite to the magnetic circuit system, four centering branches are respectively arranged at four corners of the shell, a plurality of voice coils are arranged side by side, 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, along the direction in which the plurality of voice coils are arranged side by side, the voice coils at both ends are respectively connected to two corresponding centering branches, the conductive branch is arranged on a side of the diaphragm assembly facing the magnetic circuit system and is located between two adjacent voice coils, and the lead lines of the two adjacent voice coils are respectively electrically connected to the conductive branch, so that the two adjacent voice coils are arranged in series.

[0010] The number of the conductive branches is the same as the number of the common magnetic part, and the conductive branches and the common magnetic part are arranged opposite to each other along the vibration direction of the vibration system.

[0011] In an embodiment, the shell has two long-axis sides and two short-axis sides connected end to end, and the connection between the long-axis side and the short-axis side forms the corner;

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

[0013] In an embodiment, the side magnetic part is provided with a clearance gap communicating with the magnetic gap corresponding to each corner, each centering branch is arranged corresponding to the clearance gap, one end of each centering branch is connected to the corner, and the other end of each centering branch extends into the magnetic gap and is connected to the voice coil.

[0014] In an embodiment, the side magnetic part comprises a side magnet and a side Halsal arranged in layers, and the side magnet is connected to the magnetic yoke;

[0015] The side magnet comprises a first side magnet extending along the long-axis side and a second side magnet extending along the short-axis side, and the clearance gap is formed between adjacent first side magnets and second side magnets;

[0016] The side Halsal comprises a first side Halsal extending along the long-axis side and a second side Halsal extending along the short-axis side, the first side Halsal corresponds to the first side magnet, and the second side Halsal corresponds to the second side magnet.

[0017] In an embodiment, the side magnet comprises two first side magnets, and each first side magnet is arranged corresponding to a long-axis side;

[0018] Alternatively, the number of the voice coils is N, N ≥ 2, and the side magnets include 2N first side magnets, each N first side magnets corresponding 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 portion, and the width of the gap along the extension direction of the long axis side is smaller than the width of the common magnetic portion along the extension direction of the long axis side.

[0019] In one embodiment, the side magnets include one second side magnet provided 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 magnets include a plurality of second side magnets provided corresponding to each of the short-axis sides, and the plurality of second side magnets provided corresponding to each of the short-axis sides are arranged adjacent to each other along the extension direction of the short-axis sides;

[0020] and / or, the avoidance gap is formed between adjacent first side washers and second side washers;

[0021] And / or, the first side washer and the second side washer are integrally injection-molded with the housing;

[0022] And / or, the first side washers corresponding to each of the long axis sides include one or more;

[0023] And / or, the second side washers corresponding to each of the short axis sides include one or more.

[0024] In one embodiment, the common magnetic portion is provided with a avoidance structure corresponding to the conductive support piece;

[0025] 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.

[0026] In one embodiment, the common magnetic portion includes a common magnet and a common washer that are stacked, and the common magnet is connected to the magnetic yoke;

[0027] The avoidance structure includes a first avoidance area and a second avoidance area that are connected to each other. 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 that sequentially passes through the common washer and the common magnet.

[0028] In one embodiment, the conductive support includes a connecting portion and two pad portions provided at both ends of the connecting portion, the two pad portions being located on opposite sides of the connecting portion, the connecting portion extending along the length direction of the common magnetic portion, the connecting portion corresponding to the first avoidance area, and each pad portion corresponding to one of the second avoidance areas;

[0029] And / or, the edge magnet portion includes stacked edge magnets and edge washers, the edge magnets are connected to the magnetic yoke, and the common washer and the edge washer are an integrally formed structure.

[0030] In one embodiment, a projection of the conductive support along the vibration direction of the vibration system is located in the middle of the common magnetic portion.

[0031] In one embodiment, the diaphragm assembly includes a diaphragm and a vibration plate, the diaphragm includes an inner fixing part, a folding ring part and an outer fixing part connected in sequence from the inside to the outside, the inner fixing part is connected to the vibration plate, the outer fixing part is connected to the outer shell, and the conductive support plate is arranged on the vibration plate.

[0032] In one embodiment, the conductive support is an FPCB pad attached to the vibration plate;

[0033] Alternatively, the conductive support is a conductive coating attached to the vibration plate;

[0034] Alternatively, the conductive support is a wire connected to the vibration plate, and the wire and the two voice coils are wound with a single wire.

[0035] 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.

[0036] The present utility model also provides an electronic device, which includes the above-mentioned sound-generating device.

[0037] The sound-generating device of the technical solution of the present invention houses a magnetic circuit system and a vibration system in a shell, and sets 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, and sets central magnetic parts on opposite sides of the common magnetic part, and sets 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 part arranged around it form a magnetic gap, and sets 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 shell and arranged opposite to the magnetic circuit system, and the four centering supports are respectively arranged at the four corners of the shell, and multiple 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 along which the multiple voice coils are arranged side by side, the voice coils at both ends are respectively connected to the corresponding two centering supports, and the conductive support plate is arranged on the side of the diaphragm assembly facing the magnetic circuit system and between two adjacent voice coils, so that the two adjacent voice coils are connected to each other. The leads of the voice coils are electrically connected to the conductive supports, respectively, so that two adjacent voice coils are arranged in series. In this way, when current is passed through the multiple voice coils, the multiple voice coils are connected in series through the conductive supports, and vibrate in the magnetic fields of the multiple magnetic gaps formed by the magnetic circuit system, driving the diaphragm assembly to vibrate and produce sound. At the same time, four centering supports cooperate with the conductive supports to center the multiple voice coils, thereby preventing polarization or swinging of the voice coils during vibration. At the same time, the conductive supports are arranged on the side of the diaphragm assembly facing the magnetic circuit system and between the two adjacent voice coils. The number of conductive supports is set to be the same as the number of the shared magnetic part. Along the vibration direction of the vibration system, the conductive supports and the shared magnetic part are arranged one by one opposite each other. This not only electrically connects the leads of the two adjacent voice coils to the conductive supports, thereby allowing the two adjacent voice coils to be arranged in series, but also eliminates the need for centering supports on the long axis of the side magnetic part, thereby further increasing the volume of the side magnetic part, effectively improving the magnetic field strength, and increasing the product BL value, thereby improving the loudness and sensitivity of the sound-producing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0039] Figure 1 A schematic structural diagram of an embodiment of a sound-generating device provided by the present utility model;

[0040] Figure 2 A structural diagram of an embodiment of a sound-generating device provided by the present utility model from another perspective;

[0041] Figure 3 This is an exploded schematic diagram of an embodiment of the sound-generating device provided by the present utility model;

[0042] Figure 4 This is a schematic cross-sectional view of the sound-generating device along the long axis in one embodiment of the present invention;

[0043] Figure 5 This is a schematic cross-sectional view of a sound-generating device along the minor axis in one embodiment of the present invention;

[0044] Figure 6 This is a cross-sectional schematic diagram of the sound-generating device in one embodiment of the present invention from another perspective along the short axis direction;

[0045] Figure 7 A partial structural diagram of an embodiment of a magnetic circuit system provided by the present utility model;

[0046] Figure 8 This is a schematic diagram of the structure of the connection between the vibration plate, the voice coil and the centering support in one embodiment of the present invention;

[0047] Figure 9 A schematic structural diagram of another perspective showing the connection between the vibration plate, the voice coil and the centering support in one embodiment of the present invention;

[0048] Figure 10 This is a structural diagram of the connection between the housing, the side washers and the common washer in one embodiment of the present invention.

[0049] Description of Figure Numbers:

[0050] 100. Sounding device; 1. Housing; 11. Long axis; 12. Short axis; 13. Corner; 2. Magnetic circuit system; 21. Magnetic yoke; 22. Center magnetic portion; 221. Center magnet; 222. Center washer; 23. Side magnetic portion; 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 portion; 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. External 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.

[0051] The purposes, functional features and advantages of the utility model will be further described in combination with embodiments with reference to the drawings. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0053] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0054] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that three schemes are included, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B schemes are satisfied at the same time.

[0055] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0056] The utility model provides a kind of sound production device 100.It can be understood that sound production device 100 can be applied to electronic equipment, and electronic equipment can be smart watch, mobile phone, tablet, computer, earphone etc., not limited here.

[0057] Please refer to Figures 1 to 10As shown, in an 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 provided on the magnetic yoke 21. The central magnetic portion 22 is provided on opposite sides of the common magnetic portion 24. 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 provided 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 provided at the four corners 13 of the housing 1. Multiple voice coils 32 are arranged side by side. 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. 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 supports 33. A conductive support 34 is provided 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 portions of the two adjacent voice coils 32 are respectively electrically connected to the conductive supports 34, so that the two adjacent voice coils 32 are arranged in series. The number of conductive supports 34 is the same as the number of shared magnetic portions 24. Along the vibration direction of the vibration system 3, the conductive supports 34 and the shared magnetic portions 24 are arranged one by one opposite each other.

[0058] 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 disposed relative to each other. Of course, in other embodiments, the diaphragm assembly 31 of the vibration system 3 may also be disposed outside the magnetic circuit system 2, which is not a limitation here.

[0059] Optionally, the magnetic circuit system 2 can be arranged in a square shape. For example, the magnetic circuit system 2 can include a central magnetic portion 22 and a side magnetic portion 23, both of which have a square structure. The vibration system 3 can also be arranged in a square shape. It is understood that the periphery of the diaphragm assembly 31 of the vibration system 3 can be connected to the magnetic circuit system 2, or the magnetic circuit system 2 and the vibration system 3 can be separately assembled on the outer shell or module housing, etc., without limitation herein.

[0060] 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 、 Figure 10 As shown, the sound-generating device 100 further includes a housing 1 , in which the magnetic circuit system 2 and the vibration system 3 are accommodated.

[0061] In the embodiment, the shell 1 is used for mounting, fixing and supporting the magnetic circuit system 2, the vibration system 3 and other components, that is, the shell 1 provides a mounting base for the magnetic circuit system 2, the vibration system 3 and other components. It can be understood that the shell 1 can be an integral structure or a plurality of split structures matched to form, which is not limited here.

[0062] Optionally, the shell 1 can be a frame structure, that is, the shell 1 has a cavity with two open ends, and the magnetic circuit system 2 and the vibration system 3 are connected to the two sides of the shell 1, so that the magnetic circuit system 2, the shell 1 and the diaphragm 31 of the vibration system 3 form a vibration cavity.

[0063] Specifically, the shell 1 is a rectangular frame, and the shell 1 has a receiving cavity in the middle. Along the central axis direction, the shell 1 has opposite first and second side surfaces. The central axis direction of the shell 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 shell 1, and the vibration system 3 is connected to the second side surface of the shell 1. In this way, the magnetic circuit system 2 and the vibration system 3 are oppositely arranged and can drive the vibration system 3 to vibrate and sound when the vibration system 3 is powered.

[0064] In the embodiment, the periphery of the diaphragm assembly 31 of the vibration system 3 is connected to the shell 1 and oppositely arranged with the magnetic circuit system 2; or the periphery of the diaphragm assembly 31 of the vibration system 3 is connected to the shell 1, and the center of the diaphragm assembly 31 is connected to the center magnetic part 22 of the magnetic circuit system 2 and oppositely arranged with the magnetic circuit system 2; or the periphery of the diaphragm assembly 31 of the vibration system 3 is connected to the shell 1, and the center of the diaphragm assembly 31 is provided with a through hole structure 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 part 23 of the magnetic circuit system 2 or a support on the shell 1, which is not limited here.

[0065] It can be understood that the sound generating device 100 is applied to electronic equipment, that is, the sound generating device 100 can be installed in the electronic equipment through the shell 1. It should be noted that the shell 1 of the sound generating device 100 can be an independent shell or a box structure of the electronic equipment. At this time, the shell 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, thereby facilitating disassembly. Of course, the shell 1 of the sound generating device 100 can also be an integral structure with the shell or box structure of the electronic equipment. In this way, the structural strength and sealing performance can be effectively improved, and the size of the electronic equipment can be reduced.

[0066] In the embodiment, the shell 1 is used to accommodate and fix the vibration system 3 and the magnetic circuit system 2 and other structures, so that the sound generating device 100 can be applied to electronic equipment as an independent component.

[0067] It can be understood that by setting the magnetic circuit system 2 as the magnetic yoke 21 and the center magnetic part 22, the side magnetic part 23 and the shared magnetic part 24 arranged on the magnetic yoke 21, at this time, the magnetic circuit system 2 can be connected with the shell 1 through the magnetic yoke 21, or the magnetic circuit system 2 can be connected with the shell 1 through the side magnetic part 23, which is not limited here.

[0068] In the embodiment, by setting the center magnetic part 22 as a plurality of parts, and setting a shared magnetic part 24 between two adjacent center magnetic parts 22, that is, the opposite sides of the shared magnetic part 24 are respectively provided with the center magnetic part 22, and the side magnetic part 23 is annularly arranged outside the shared magnetic part 24 and the center magnetic part 22, so that each center magnetic part 22 is surrounded by the side magnetic part 23 and the shared magnetic part 24 arranged around it to form a magnetic gap 25, that is, two adjacent magnetic gaps 25 are located on opposite sides of the shared magnetic part 24, and each magnetic gap 25 surrounds a center magnetic part 22. In this way, the diaphragm assembly 31 of the vibration system 3 is connected with the shell 1, so that one end of the plurality of voice coils 32 is connected with the diaphragm assembly 31, and the other end of the plurality of voice coils 32 is respectively arranged corresponding to the plurality of magnetic gaps 25.

[0069] Alternatively, the plurality of voice coils 32 are arranged side by side. In order to realize the flow of current in the plurality of voice coils 32 and the electrical connection with the external circuit. In an embodiment, the vibration system 3 further comprises a conductive branch 34 and a centering branch 33, the conductive branch 34 is arranged on the side of the diaphragm assembly 31 facing the magnetic circuit system 2 and located between two adjacent voice coils 32, the lead lines of the two adjacent voice coils 32 are respectively electrically connected with the conductive branch 34, so that the two adjacent voice coils 32 are connected in series, and along the direction of the plurality of voice coils 32 arranged side by side, the voice coils 32 at both ends are respectively connected with the two corresponding centering branches 33.

[0070] It can be understood that by arranging the conductive branch 34 on the side of the diaphragm assembly 31 facing the magnetic circuit system 2 and between two adjacent voice coils 32, the lead lines of the two adjacent voice coils 32 are respectively electrically connected with the conductive branch 34, which not only realizes the series connection of the two adjacent voice coils 32, but also cancels the arrangement of the centering branch 33 on the long axis of the side magnetic part 23, thereby further increasing the volume of the side magnetic part 23 and effectively improving the magnetic field strength, thereby improving the BL value of the product, and further improving the loudness and sensitivity of the sound generating device 100. Moreover, the four centering branches 33 cooperate with the conductive branch 34 to realize the centering effect of the plurality of voice coils 32, avoiding the phenomenon of polarization or oscillation of the voice coil 32 during vibration, and further improving the acoustic performance of the sound generating device 100.

[0071] In the embodiment, as Figure 3 , Figure 8 and Figure 9As shown, the centering support 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.

[0072] As will be appreciated, the centering supports 33 electrically connect the voice coils 32 at both ends of the multiple voice coils 32 along the parallel arrangement direction to the external circuit, and the multiple voice coils 32 are connected in series via the conductive supports 34, thereby allowing current to flow through the multiple voice coils 32. Optionally, there are multiple conductive supports 34. In this embodiment, the number of voice coils 32 is N, where N ≥ 2, and the number of conductive supports 34 is N-1. In this embodiment, the centering supports 33 can be disposed at the bottom of the voice coil 32, with four centering supports 33 located at the four corners of the sound-generating device 100.

[0073] Of course, in other embodiments, in order to achieve 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 to 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.

[0074] Optionally, when the number of voice coils 32 is N, the number of central magnetic parts 22 is N, and the number of shared magnetic parts 24 is N−1.

[0075] In one embodiment, if Figure 3 、 Figure 4 、 Figure 7 and Figure 9 As shown, there may be two voice coils 32, one conductive support plate 34 may be selected and located between the two voice coils 32, four centering supports 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.

[0076] In the embodiment, the two center magnetic portions 22 share one common magnetic portion 24 and form two magnetic gaps 25, so that the two voice coils 32 can fully utilize the magnetic field of the center magnetic portions 22, improve the magnetic energy utilization rate of the center magnetic portions 22, and thus improve the loudness and sensitivity of the sound generating device 100, thereby improving the product performance. The four centering fins 33 are respectively arranged at the four corner portions of the housing 1, and the conductive fin 34 is arranged on the side of the diaphragm assembly 31 facing the magnetic circuit system 2 and located between the adjacent two voice coils 32, and in the vibration direction of the vibration system 3, the conductive fin 34 is arranged opposite to the common magnetic portion 24. Not only does this make the lead portions of the adjacent two voice coils 32 respectively electrically connected with the conductive fin 34 to realize the series connection of the adjacent two voice coils 32, but also cancels the centering fin 33 arranged on the long axis of the side magnetic portion 23, thereby further increasing the volume of the side magnetic portion 23 and effectively improving the magnetic field strength and the product BL value, and thus improving the loudness and sensitivity of the sound generating device 100.

[0077] Optionally, the magnetic circuit system 2 has a flat plate structure, the common magnetic portion 24, the center magnetic portion 22 and the side magnetic portion 23 are all strip-shaped and are fixed to the side of the magnetic conductive yoke 21 facing the vibration system 3.

[0078] In the embodiment, the outer periphery of the diaphragm assembly 31 of the vibration system 3 is connected to the second side of the housing 1; the two voice coils 32 are arranged 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 energized, it is driven by the magnetic circuit system 2 to drive the diaphragm assembly 31 to vibrate and sound. The four centering fins 33 are respectively arranged at the four corner portions 13 of the housing 1, and each centering fin 33 is connected between the corner portion 13 of the first side of the housing 1 and the voice coil 32 corresponding to the corner portion 13, so as to reduce the polarization of the two voice coils 32 in the non-vibration direction. At the same time, the conductive fin 34 is located between the two voice coils 32 and is specifically arranged on the diaphragm assembly 31, and the conductive fin 34 is electrically connected with the lead portions of the two voice coils 32, so as to not only realize the series connection of the two voice coils 32, but also realize the centering effect of the adjacent two voice coils 32 by the conductive fin 34, that is, the conductive fin 34 cooperates with the four centering fins 33 of the four corner portions 13 to realize the centering effect of the voice coil 32, thereby avoiding the polarization or swing of the voice coil 32 during vibration, and thus improving the sound quality effect of the sound generating device 100.

[0079] In an embodiment, the diaphragm assembly 31 has two long-axis sides and two short-axis sides connected end to end, and the two center magnetic portions 22 are arranged along the direction of the long-axis sides.

[0080] In this embodiment, if Figure 1 、 Figure 3 、 Figure 8 and Figure 9 As shown, the diaphragm assembly 31 can optionally 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 portions 22 are arranged at intervals along the long axis sides, that is, the two magnetic gaps 25 of the magnetic circuit system 2 are arranged at intervals along the long axis sides, so that the two voice coils 32 are arranged at intervals along the long axis sides.

[0081] The sound-generating device 100 of the present invention is configured by housing a magnetic circuit system 2 and a vibration system 3 in a housing 1, and configuring the magnetic circuit system 2 to include a magnetic yoke 21, a side magnetic portion 23, a common magnetic portion 24, and a central magnetic portion 22 provided on the magnetic yoke 21, and providing central magnetic portions 22 on opposite sides of the common magnetic portion 24, and configuring the side magnetic portions 23 to be arranged around 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 form a magnetic gap 25, and configuring the vibration system 3 to include a diaphragm assembly 31, a conductive support 34, and at least two voice coils 3. 2 and four centering supports 33, so that the periphery of the diaphragm assembly 31 is connected to the housing 1 and is arranged opposite to the magnetic circuit system 2, and the four centering supports 33 are respectively arranged at the four corners 13 of the housing 1, and the multiple 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 along which the multiple 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 The lead wires of two adjacent voice coils 32 are electrically connected to the conductive support pieces 34, so that the two adjacent voice coils 32 are arranged in series. In this way, current is passed through the multiple voice coils 32, so that the multiple voice coils 32 are connected in series through the conductive support pieces 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. At the same time, the four centering support pieces 33 cooperate with the conductive support pieces 34 to achieve a centering effect on the multiple voice coils 32, thereby avoiding polarization or swinging of the voice coils 32 during the vibration process. At the same time, the conductive support pieces 34 are arranged on the diaphragm assembly 31 facing the magnetic circuit system 2 and is located on one side of the adjacent voice coils 32, and the number of the conductive supports 34 is set to be the same as the number of the common magnetic parts 24. Along the vibration direction of the vibration system 3, the conductive supports 34 and the common magnetic parts 24 are arranged one by one opposite to each other, so that the lead parts of the two adjacent voice coils 32 are electrically connected to the conductive supports 34 respectively, which not only realizes the series connection of the two adjacent voice coils 32, but also eliminates the need to set the centering support 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 thus improving the loudness and sensitivity of the sound-emitting device 100.

[0082] 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; multiple voice coils 32 are arranged at intervals along the extension direction of the long axis side 11, and 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.

[0083] In this embodiment, if Figure 3and Figure 10 As shown, the housing 1 can be optionally a rectangular frame structure, and a plurality of voice coils 32 can 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 are 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.

[0084] It is understandable that the housing 1 is a rectangular frame, thereby forming a rectangular structure of the sound-generating device 100. Of course, in other embodiments, the sound-generating device 100 can also be formed into other shapes, such as squares or other polygons, which are not limited here.

[0085] To facilitate installation of the centering support 33 and prevent interference between the centering support 33 and the edge magnet 23, in one embodiment, a clearance notch 233 is provided on the edge magnet 23 corresponding to each corner 13, which connects to the magnetic gap 25. Each centering support 33 is provided corresponding to a clearance notch 233. One end of each centering support 33 is connected to the corner 13, while the other end extends into the magnetic gap 25 and is connected to the voice coil 32.

[0086] In this embodiment, if Figure 3 and Figure 7 As shown, by providing relief notches 233 on the edge magnet portion 23 that connect to the magnetic gap 25, the relief notches 233 can be used to provide clearance and vibration space for the centering arm 33. As will be appreciated, the edge magnet portion 23 is provided with relief notches 233 corresponding to each corner portion 13, so that each centering arm 33 corresponds to a relief notch 233. One end of each centering arm 33 is connected to the corner portion 13, while the other end extends into the magnetic gap 25 and is connected to the voice coil 32.

[0087] Optionally, the edge magnetic parts 23 include multiple edge magnetic parts 23, which are arranged around the outside 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 gaps corresponding to the corners 13 of the shell 1 form avoidance gaps 233.

[0088] In this embodiment, if Figure 3 and Figure 7 As shown, the plurality of edge magnets 23 include edge magnets 23 extending along the long axis 11 and edge magnets 23 extending along the short axis 12 . Adjacent edge magnets 23 are spaced apart to form avoidance gaps 233 corresponding to the corners 13 , which are not limited here.

[0089] 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 separated into two rectangular cavities by the common magnetic portion 24.

[0090] 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 notches 233 at the corners of the edge magnet portion 23 can be used to provide installation and escape space for the centering support piece 33.

[0091] In one embodiment, the edge magnetic portion 23 includes stacked edge magnets 231 and edge washers 232, with the edge magnets 231 connected to the magnetic yoke 21. The edge magnets 231 and edge washers 232 of the edge magnetic portion 23 are disposed around the outside of the central magnetic portion 22 and the common magnetic portion 24. It is understood that the avoidance gap 233 can be formed by the edge magnets 231 and / or edge washers 232 of the edge magnetic portion 23, and this is not limited herein.

[0092] Optionally, the edge magnets 231 of the edge magnet portion 23 may be permanent magnets. The edge washers 232 may be magnetically conductive plates. It is understood that the edge magnets 231 and edge washers 232 of the edge magnet portion 23 may be integral or separate structures, which is not limited herein.

[0093] In this embodiment, if Figure 3 and Figure 7 As shown, the side magnet 231 includes a first side magnet 2311 extending along the long axis side 11 and a second side magnet 2312 extending along the short axis side 12, and the side washer 232 includes a first side washer 2321 extending along the long axis side 11 and a second side washer 2322 extending along the short axis side 12. The first side washer 2321 corresponds to the first side magnet 2311, and the second side washer 2322 corresponds to the second side magnet 2312.

[0094] Optionally, a first gap is formed between adjacent first side magnets 2311 and second side magnets 2312, and a second gap is formed between adjacent first side washers 2321 and second side washers 2322. The first and second gaps 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 is correspondingly connected to the second gap formed between the first side washer 2321 and the second side washer 2322 of the side washer 232, and the gaps are disposed corresponding to the corners 13 of the housing 1.

[0095] In one embodiment, the side magnets 231 include two first side magnets 2311, each of which is positioned corresponding to a longitudinal side 11. It is understood that the first side magnets 2311 can optionally be arranged in a strip shape and extend along the length of the longitudinal side 11. This simplifies the structural design of the side magnet portion 23 and facilitates assembly.

[0096] 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 .

[0097] In another embodiment, the number of voice coils 32 can be selected as N, N≥2, and the side magnets 231 include 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.

[0098] 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 adjacent to 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 portion 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 portion 24 along the extension direction of the long axis side 11. Such a setting can not only ensure smooth airflow, but also reduce the space reserved by the side magnetic portion 23 for the original centering support plate 33, thereby increasing the volume of the side magnet 231 of the side magnetic portion 23, thereby increasing the magnetic field strength, improving the product BL value, and improving the acoustic performance.

[0099] In one embodiment, the side magnets 231 include a second side magnet 2312 corresponding to each minor axis side 12. Each second side magnet 2312 and the shared magnetic portion 24 are located on opposite sides of the central magnetic portion 22. It will be appreciated that each second side magnet 2312 is corresponding to a minor axis side 12. The second side magnets 2312 may optionally be strip-shaped and extend along the length of the minor axis side 12.

[0100] In another embodiment, the side magnets 231 include a plurality of second side magnets 2312 disposed corresponding to each minor axis side 12, and the plurality of second side magnets 2312 disposed corresponding to each minor axis side 12 are arranged adjacent to each other along the extension direction of the minor axis side 12. It is understood that each minor 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 minor axis side 12.

[0101] Optionally, the number of first side washers 2321 corresponding to each long axis side 11 may be one or more, and the number of second side washers 2322 corresponding to each short axis side 12 ...

[0102] To facilitate manufacturing of the side washers 232, in this embodiment, the first and second side washers 2321, 2322 of the side washers 232 are integrally molded. To further simplify manufacturing, in one embodiment, the first and second side washers 2321, 2322 of the side washers 232 are integrally injection molded with the housing 1. It is understood that the housing 1 can be made of plastic, and the side washers 232 can be made of a metal magnetic conductive plate. Integral injection molding of the housing 1 and side washers 232 ensures structural stability and simplifies manufacturing.

[0103] In one embodiment, the common magnetic portion 24 is provided with a avoiding structure 243 corresponding to the conductive support piece 34 .

[0104] Understandably, Figures 3 to 5 、 Figure 7 and Figure 9 As shown, placing the conductive support 34 in the vibration system 3 will correspondingly increase the thickness of the diaphragm assembly 31. By providing a relief structure 243 on the common magnetic portion 24, the relief structure 243 provides space for the conductive support 34 to escape when the diaphragm assembly 31 vibrates, effectively reducing the vibration space occupied by the increased thickness, thereby ensuring the vibration space of the vibration system 3. Optionally, the relief structure 243 is a groove formed by the common magnetic portion 24 being recessed toward the guide yoke 21. Of course, in other embodiments, the relief structure 243 can be a through-hole structure that penetrates the common magnetic portion 24, which is not limited here.

[0105] In one embodiment, the common magnetic portion 24 includes a common magnet 241 and a common washer 242 that are stacked together. The common magnet 241 is connected to the magnetically conductive yoke 21 .

[0106] Understandably, Figure 3 、 Figure 7 and Figure 10As shown, the common magnet 241 and the common washer 242 of the common magnetic portion 24 have the same outer profile. In this embodiment, the center magnet 221 and the center washer 222 of the center magnetic portion 22 have the same outer profile, and the side magnets 231 and the side washers 232 of the side magnetic portion 23 have substantially the same outer profile in the long axis direction. Adjacent side washers 232 are connected so that the plurality of side washers 232 form an annular structure with the same outer profile as the housing 1. The plurality of side washers 232 integrally arranged in this manner are connected to the first side surface of the housing 1 via the side surface facing away from the magnetic yoke 21.

[0107] 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. This is beneficial for heat dissipation, thereby increasing service life.

[0108] In one embodiment, the edge magnet portion 23 includes stacked edge magnets 231 and edge washers 232. The edge magnets 231 are connected to the magnetic yoke 21, and the shared washer 242 and edge washer 232 are integrally formed. As will be appreciated, this arrangement allows the edge washers 232 of the edge magnet portion 23 and the shared washer 242 of the shared magnetic portion 24 to be integrally formed, thereby improving processing efficiency while ensuring structural strength.

[0109] In this embodiment, if Figure 3 and Figure 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.

[0110] 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 gap that passes through the common washer 242 and the common magnet 241 in sequence.

[0111] In this embodiment, if Figure 3 、 Figure 5 、 Figure 7 and Figure 10 As 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 gap that passes through the common washer 242 and the common magnet 241 in sequence. 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 piece 34.

[0112] In one embodiment, the conductive support 34 includes a connecting portion 341 and two pad portions 342 disposed 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. The connecting portion 341 corresponds to the first avoidance area 2431, and each pad portion 342 corresponds to a second avoidance area 2432.

[0113] In this embodiment, if Figure 3 and Figure 9 As shown, the connecting portion 341 and the two pad portions 342 of the conductive support 34 can be integrally formed. The two pad portions 342 are provided at both ends of the connecting portion 341 and on opposite sides of the connecting portion 341. The leads of the two adjacent voice coils 32 are connected to the two pad portions 342 respectively.

[0114] In this embodiment, 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. This arrangement allows the second avoidance areas 2432 to provide ample clearance between the pad portions 342 and the lead portion of the voice coil 32. Furthermore, the first avoidance areas 2431 provide clearance for the connection portion 341 without affecting the structural strength and magnetic field intensity of the common magnetic portion 24. Optionally, the connection portion 341 extends along the length of the common magnetic portion 24.

[0115] In one embodiment, if Figure 3 、 Figure 5 、 Figure 7 、 Figure 9 and Figure 10 As shown, the projection of the conductive support 34 along the vibration direction of the vibration system 3 is located in the middle of the common magnetic portion 24. It can be understood that the provision of the conductive support 34 not only enables the series connection and conduction of the two adjacent voice coils 32, but also serves to center the two adjacent voice coils 32, ensuring that the wiring distance between the two adjacent voice coils 32 and the conductive support 34 remains substantially consistent. This ensures that the pulling force on the two adjacent voice coils 32 is substantially consistent, further preventing problems such as polarization of the voice coils 32 during vibration.

[0116] 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 connected in sequence 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 piece 34 is provided on the vibration plate 312.

[0117] In this embodiment, if Figure 1 、 Figures 3 to 6 、 Figure 8 and Figure 9 As shown, by setting the diaphragm assembly 31 as a two-part structure of the diaphragm 311 and the vibrating plate 312, the diaphragm 311 is formed as an annular structure, and the vibrating plate 312 is optionally bonded to the inner fixed part 3111 of the diaphragm 311. Optionally, the inner fixed part 3111, the folded ring part 3112, and the outer fixed part 3113 of the diaphragm 311 are integrally formed.

[0118] It can be understood that the inner fixed part 3111 and the outer fixed part 3113 of the diaphragm 311 have a relative displacement in the central axis direction due to the folded ring part 3112, and the vibrating plate 312 is connected to the inner fixed part 3111, and the outer fixed part 3113 is connected to the second side of the shell 1, thereby making the vibrating plate 312 and the shell 1 have a relative displacement in the vibration direction. The outer periphery of the outer fixed part 3113 is further provided with a flange bent to the side of the shell 1, which can further improve the connection strength with the shell 1.

[0119] In the present embodiment, by setting the folded ring part 3112, the range of the deformation region in the diaphragm 311 can be improved, and the relative position of the diaphragm 311 in the vibration direction can be improved. Optionally, the folded ring part 3112 is a convex structure protruding upward or a concave structure recessing downward, which is not limited herein. The folded ring part 3112 in the present embodiment is recessed to one side, which can reduce the height of the diaphragm 311 in the vibration direction, and thereby correspondingly reduce the thickness of the diaphragm assembly 31 and the sound generating device 100. The folded ring part 3112 is recessed to the side of the magnetic circuit system 2, which can avoid interference between the diaphragm 311 and the shell 1 when the diaphragm 311 vibrates.

[0120] In an embodiment, the vibrating plate 312 is connected to the side of the inner fixed part 3111 facing the magnetic circuit system 2, and the two voice coils 32 are connected to the vibrating plate 312; and the vibrating plate 312 is further provided with a protruding part. It can be understood that by setting the protruding part on the vibrating plate 312, the strength of the vibrating plate 312 can be improved, and thereby the performance of the sound generating device 100 can be ensured.

[0121] In an embodiment, the conductive branch 34 is a FPCB pad or a conductive coating attached to the vibrating plate 312. In this way, the structural diversity of the conductive branch 34 can be improved, and thereby the practicality is wide.

[0122] Optionally, the conductive branch 34 is a FPCB material. Of course, in other embodiments, the conductive branch 34 can also be a conductive coating or a conductive coating glue coated on the vibrating plate 312, which is not limited herein.

[0123] In one embodiment, the conductive support 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, reduces the two lead weldings of the two voice coils 32, and thus reduces the assembly process of the sound-generating device 100 and improves the assembly efficiency of the sound-generating device 100.

[0124] The present invention also provides an electronic device including the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 is similar to that of the aforementioned embodiments. Since the present electronic device utilizes all the technical solutions of all the aforementioned embodiments, it at least has all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and thus will not be described in detail here.

[0125] 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.

[0126] In this embodiment, the electronic device further includes a flexible circuit board (FPCB), one end of which is electrically connected to the sound-generating device 100, and the other end of which is connected to an external power source. As will be appreciated, the FPCB is used to electrically connect the external circuit to the voice coil 32 of the sound-generating device 100. The FPCB has inner and outer pads. The inner pads are electrically connected to the sound-generating device 100, while the outer pads are used to connect to external terminals.

[0127] In this embodiment, the device housing has an installation space, the sound-generating device 100 is disposed within the installation space of the device housing, and at least one end of the flexible printed circuit board connected to the sound-generating device 100 is located within the installation space of the device housing. Of course, in other embodiments, the entire flexible printed circuit board may be disposed within the installation space of the device housing, and this is not limited here.

[0128] It is understood that the electronic device can be a headset, a mobile phone, an MP3, an MP4, a computer, a tablet computer, a smart wearable device, etc., and is not limited here. In the electronic device, the sound device 100 can be assembled into the housing of the electronic device in a module or in a single unit.

[0129] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect application 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 connected to the housing, comprising a magnetic yoke and edge magnetic portions, a common magnetic portion, and a central magnetic portion provided on the magnetic yoke, wherein the central magnetic portions are provided on opposite sides of the common magnetic portion, the edge magnetic portions are provided on the outside of the common magnetic portion and the central magnetic portion, and each central magnetic portion is surrounded by the edge magnetic portions and the common magnetic portion provided therearound to form a magnetic gap; and A vibration system comprising 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 is arranged opposite to the magnetic circuit system, and the four centering supports are respectively provided at the four corners of the housing. The plurality of voice coils are arranged side by side, with one end of each voice coil connected to the diaphragm assembly, and the other end of each voice coil suspended within a magnetic gap. Along the direction in which the plurality of voice coils are arranged side by side, the voice coils at the two ends are respectively connected to the corresponding two centering supports, and the conductive support is provided 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 supporting pieces is the same as the number of the common magnetic parts, and along the vibration direction of the vibration system, the conductive supporting pieces and the common magnetic parts are arranged one by one opposite to each other.

2. The sound-generating device according to claim 1, wherein: 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 portion; 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, wherein: The edge magnet portion is provided with an avoidance gap corresponding to each corner portion and connected to the magnetic gap. Each centering support piece is provided corresponding to one of the avoidance gaps, and one end of each centering support piece is connected to the corner portion, and the other end of each centering support piece extends into the magnetic gap and is connected to the voice coil.

4. The sound-generating device according to claim 3, wherein: The edge magnet portion 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 adjacent first side magnets and second side magnets; The side washers include 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.

5. The sound-generating device according to claim 4, wherein: The side magnet includes two first side magnets, each of which is arranged corresponding to one of the long axis sides; Alternatively, the number of the voice coils is N, N ≥ 2, and the side magnets include 2N first side magnets, each N first side magnets corresponding 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 portion, and the width of the gap along the extension direction of the long axis side is smaller than the width of the common magnetic portion along the extension direction of the long axis side.

6. The sound-generating device according to claim 4, wherein: The side magnets include one second side magnet 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 magnets include a plurality of second side magnets corresponding to each of the short-axis sides, and the plurality of second side magnets 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 adjacent first side washers and 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.

7. The sound-generating device according to claim 1, wherein: The common magnetic portion is provided with a avoidance structure corresponding to the conductive support piece; 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.

8. The sound-generating device according to claim 7, wherein: The common magnetic part includes a common magnet and a common washer arranged in a stacked manner, and the common magnet is connected to the magnetic yoke; The avoidance structure includes a first avoidance area and a second avoidance area that are connected to each other. 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 that sequentially passes through the common washer and the common magnet.

9. The sound-generating device according to claim 8, wherein: The conductive support includes a connecting portion and two pad portions provided at both ends of the connecting portion, the two pad portions being located on opposite sides of the connecting portion, the connecting portion extending along the length direction of the common magnetic portion, the connecting portion corresponding to the first avoidance area, and each pad portion corresponding to one of the second avoidance areas; And / or, the edge magnet portion includes stacked edge magnets and edge washers, the edge magnets are connected to the magnetic yoke, and the common washer and the edge washer are an integrally formed structure.

10. The sound-generating device according to claim 1, wherein: The projection of the conductive support piece along the vibration direction of the vibration system is located in the middle of the common magnetic part.

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 part, a folding ring part and an outer fixing part connected in sequence from the inside to the outside. The inner fixing part is connected to the vibration plate, the outer fixing part 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, wherein: The conductive support is an FPCB pad attached to the vibration plate; Alternatively, the conductive support is a conductive coating attached to the vibration plate; Alternatively, the conductive support is a wire connected to the vibration plate, and the wire and the two voice coils are wound with a single 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 includes the sound emitting device according to any one of claims 1 to 13.

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