Vibration sound production device and electronic device

Abstract

The utility model provides vibration sounding device, it includes first sounding unit and second sounding unit, first sounding unit includes first support, first diaphragm, first voice coil and first magnetic circuit structure, first diaphragm is connected in first support, one end of first voice coil is connected in first diaphragm, first magnetic circuit structure sets up in first support, first magnetic circuit structure has first magnetic gap, one end of first voice coil away from first diaphragm is contained in first magnetic gap, second sounding unit includes second support, second diaphragm, second voice coil and second magnetic circuit structure, second diaphragm is connected in second support, one end of second voice coil is connected in second diaphragm, second magnetic circuit structure sets up in second support, second magnetic circuit structure has second magnetic gap, one end of second voice coil away from second diaphragm is contained in second magnetic gap, first support is connected in second support, the axis of first diaphragm and the axis of second diaphragm are collinear. The utility model also provides electronic equipment with vibration sounding device.

Description

Technical Field

[0001] This utility model relates to the field of acoustics, and in particular to a vibration sound-generating device and an electronic device equipped with the vibration sound-generating device. Background Technology

[0002] Traditional loudspeakers typically use a single driver unit, which makes it difficult to simultaneously optimize both high and low frequencies, resulting in suboptimal sound quality. To achieve better sound quality, the industry has developed loudspeaker solutions combining a tweeter and a woofer. These loudspeakers generally include a bracket, a tweeter, a woofer, and a magnetic circuit structure, all mounted on the bracket. The tweeter and woofer share the same magnetic circuit structure. However, the tweeter, magnetic circuit structure, and woofer must be installed sequentially within the bracket, leading to complex manufacturing processes and difficulties in process control. Furthermore, the shared magnetic circuit structure limits further improvements in magnetic circuit performance. Utility Model Content

[0003] This application provides a vibration-generating sound device and an electronic device equipped with the vibration-generating sound device.

[0004] This application provides a vibration-generating sound device, comprising a first sound-generating unit and a second sound-generating unit. The first sound-generating unit includes a first support, a first diaphragm, a first voice coil, and a first magnetic circuit structure. The periphery of the first diaphragm is connected to the first support, one end of the first voice coil is connected to the middle of the first diaphragm, and the first magnetic circuit structure is disposed on the first support, spaced apart from the first diaphragm. The first magnetic circuit structure has a first magnetic gap, and the end of the first voice coil away from the first diaphragm is housed in the first magnetic gap. The second sound-generating unit includes a second support, a second diaphragm, a second voice coil, and a second magnetic circuit structure. The periphery of the second diaphragm is connected to the second support, one end of the second voice coil is connected to the middle of the second diaphragm, and the second magnetic circuit structure is disposed on the second support, spaced apart from the second diaphragm. The second magnetic circuit structure has a second magnetic gap, and the end of the second voice coil away from the second diaphragm is housed in the second magnetic gap. The first support is connected to the second support, and the axis of the first diaphragm is collinear with the axis of the second diaphragm.

[0005] This application also provides an electronic device, which includes a housing, a motherboard, and a vibration-generating device. The main body and the vibration-generating device are housed within the cavity of the housing. The motherboard is electrically connected to the vibration-generating device. The vibration-generating device includes a first sound-generating unit and a second sound-generating unit. The first sound-generating unit includes a first support, a first diaphragm, a first voice coil, and a first magnetic circuit structure. The periphery of the first diaphragm is connected to the first support, one end of the first voice coil is connected to the middle of the first diaphragm, and the first magnetic circuit structure is disposed on the first support, spaced apart from the first diaphragm. The first magnetic circuit structure has a first magnetic gap, and the first voice coil is located away from the first diaphragm. One end of the second sound-generating unit is housed in the first magnetic gap; the second sound-generating unit includes a second support, a second diaphragm, a second voice coil, and a second magnetic circuit structure. The periphery of the second diaphragm is connected to the second support, one end of the second voice coil is connected to the middle of the second diaphragm, the second magnetic circuit structure is disposed on the second support, the second magnetic circuit structure is spaced apart from the second diaphragm, the second magnetic circuit structure has a second magnetic gap, and the end of the second voice coil away from the second diaphragm is housed in the second magnetic gap; the first support is connected to the second support, and the axis of the first diaphragm is collinear with the axis of the second diaphragm; the housing is provided with a sound outlet hole, and the sound generated by the vibration sound-generating device is discharged from the housing through the sound outlet hole.

[0006] The first and second sound-generating units of the vibration sound-generating device of this application are superimposed on each other, so that the vibration sound-generating device does not need to be assembled in a certain order, which makes the assembly highly flexible, simple in structure and simple in process, and easy to control. Secondly, the first magnetic circuit structure acts on the first voice coil alone, and the second magnetic circuit structure acts on the second voice coil alone. Therefore, the two sets of linear vibration systems use different magnetic circuits, and the magnetic circuit performance is not limited by the magnetic circuit architecture design. The magnetic field strength at the positions of the first and second voice coils is equivalent to the corresponding magnetic circuit structure to achieve dual magnetic circuit performance. Attached Figure Description

[0007] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0008] Figure 1 This is a cross-sectional structural schematic diagram of the earphone head provided in one embodiment of this application.

[0009] Figure 2 yes Figure 1 An enlarged view of the vibration sound-generating device in the image.

[0010] Figure 3 yes Figure 2 An exploded view of the vibration sound-generating device in the diagram.

[0011] Figure 4 yes Figure 3 A schematic diagram of the first sound-producing unit in the image.

[0012] Figure 5 yes Figure 3 An exploded view of the second sound-producing unit.

[0013] Figure 6 This is a cross-sectional structural schematic diagram of an electronic device provided in one embodiment of the present invention.

[0014] Explanation of main labels:

[0015] 100. Earphone head; 20. Vibration sound-generating device; 30. First sound-generating unit; 32. First bracket; 320. First inner cavity; 3201. First receiving area; 3203. Second receiving area; 3204. Third receiving area; 3206. Fourth receiving area; 322. First front; 323. First back; 324. First fixing groove; 325. First positioning groove; 326. Connecting groove; 327. Sound outlet groove; 328. First vent hole; 329. First damping plate; 34. First diaphragm; 340. First fixing component; 341. First diaphragm section; 342. First curved area; 344. First folded area; 346. First connecting area; 35. First voice coil; 36. First magnetic circuit structure; 360. First magnetic gap; 362. First magnetic component; 364. First magnetic conductor; 365. First positioning component; 3652. Support section; 3654. Positioning section; 3655. Positioning space; 50. Second sound-producing unit; 52. Second bracket; 520. Second inner cavity; 5201. First positioning area; 5203. Second positioning area; 522. Second front surface; 523. Second back side; 524. Second fixing groove; 525. Second positioning groove; 526. Second vent hole; 527. Second damping plate; 528. Connecting part; 529. Third damping plate; 54. Second diaphragm; 540. Second fixing member; 541. Second diaphragm part; 542. Second arc surface area; 544. Second fold area; 546. Second connecting area; 55. Second voice coil; 56. Second magnetic circuit structure; 560. Second magnetic gap; 562. Second magnetic element; 5621. Outer ring magnet; 5623. Inner ring magnet; 5 64. Second magnetic conductor; 5641. Outer magnetic conductor; 5643. Inner magnetic conductor; 565. Second positioning component; 5652. Second through hole; 5654. Fixing groove; 566. First through hole; 61. First front cavity; 63. First rear cavity; 65. Second front cavity; 67. Second rear cavity; 80. Outer shell; 82. Receiving space; 84. Sound outlet; 300. Electronic device; 310. Housing; 312. Sound outlet; 330. Mainboard; 370. Battery; 350. Mounting shell; 352. Mounting cavity; 354. Sound outlet. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Furthermore, the following descriptions of various embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments that can be implemented in this application. Directional terms used in this application, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying illustrations. Therefore, the directional terms used are for better and clearer explanation and understanding of this application, and are not intended to indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0018] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," and "set on" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0019] Please refer to the following: Figures 1 to 3In one embodiment of this utility model, the vibration-generating device 20 is installed in the inner cavity of the housing 80 to form an earphone head 100. The housing 80 has a receiving space 82 and a sound outlet 84 communicating with the receiving space 82. The vibration-generating device 20 is housed in the receiving space 82 of the housing 80, and the sound-generating side of the vibration-generating device 20 faces the sound outlet 84. The vibration-generating device 20 includes a first sound-generating unit 30 and a second sound-generating unit 50, which are superimposed on each other. The first sound-generating unit 30 includes a first support 32, a first diaphragm 34, a first voice coil 35, and a first magnetic circuit structure 36. The periphery of the first diaphragm 34 is connected to the first support 32. One end of the voice coil 35 is connected to the middle of the first diaphragm 34 to form a first linear vibration system. A first magnetic circuit structure 36 is disposed on the first support 32, and the first magnetic circuit structure 36 is spaced apart from the first diaphragm 34. The first magnetic circuit structure 36 has a first magnetic gap 360. The end of the first voice coil 35 away from the first diaphragm 34 is housed in the first magnetic gap 360. The first diaphragm 34 forms a first vibrating sound source surface. The first voice coil 35 is in the first magnetic field provided by the first magnetic circuit structure 36. When an audio current passes through the first voice coil 35, the first voice coil 35 generates a second magnetic field that changes with the audio current. The first magnetic field and the second magnetic field interact to make the first voice coil 35 vibrate, and the first voice coil 35 drives the first diaphragm 34 to vibrate. The second sound-producing unit 50 includes a second support 52, a second diaphragm 54, a second voice coil 55, and a second magnetic circuit structure 56. The periphery of the second diaphragm 54 is connected to the second support 52, and one end of the second voice coil 55 is connected to the middle of the second diaphragm 54 to form a second linear vibration system. The second magnetic circuit structure 56 is disposed on the second support 52 and is spaced apart from the second diaphragm 54. The second magnetic circuit structure 56 has a second magnetic gap 560. The end of the second voice coil 55 away from the second diaphragm 54 is housed in the second magnetic gap 560. The second diaphragm 54 forms a second vibrating sound source surface, and the second voice coil 55 is located in a third magnetic field provided by the second magnetic circuit structure 56. When the second voice coil 55 produces sound... When the frequency current passes through, the second voice coil 55 generates a fourth magnetic field that varies with the audio current. The third magnetic field and the fourth magnetic field interact to cause the second voice coil 55 to vibrate. The second voice coil 55 drives the second diaphragm 54 to vibrate and produce sound. The vibration frequency of the first diaphragm 34 and the vibration frequency of the second diaphragm 54 can be the same or different. The first support 32 can be sleeved on the second support 52, and the second support 52 can be sleeved on the first support 32. Alternatively, after the first support 32 and the second support 52 are connected, the outer peripheral surface of the first support 32 and the outer peripheral surface of the second support 52 are coplanar. That is, the radial cross-sectional area of ​​the first support 32 can be greater than, equal to or less than the radial cross-sectional area of ​​the second support 52.In this embodiment, both the first support 32 and the second support 52 are circular frames. The outer diameter of the first support 32 closer to the second support is larger than the outer diameter of the second support 52, and the outer diameter of the first support farther from the second support is smaller than the outer diameter of the second support 52. The first support 32 is fitted onto the second support 52, and the axis of the first diaphragm 34 is collinear with the axis of the second diaphragm 54. The first sound-generating unit 30 of the vibration sound-generating device 20 is closer to the sound outlet 84 than the second sound-generating unit 50, and the first diaphragm 34 of the first sound-generating unit 30 faces the sound outlet 84. The sound generated by the first sound-generating unit 30 and the sound generated by the second sound-generating unit 50 are both emitted from the sound outlet 84.

[0020] In other embodiments, the outer diameter of the first bracket 32 ​​may be smaller than the outer diameter of the second bracket 52, and the second bracket 52 is sleeved on the first bracket 32.

[0021] Understandably, the vibration-generating device 20 can be used in headphones or speaker enclosures. In this embodiment, the vibration-generating device 20 is specifically described as a headphone generating device; when using the headphone head 100, the sound outlet 84 of the vibration-generating device 20 is directly facing the eardrum. In other embodiments, the vibration-generating device 20 can be a speaker enclosure installed on an electronic device. The term "connection" in the description of this embodiment includes both direct and indirect connections. For example, a connection between A and B includes a direct connection between A and B or a connection through a third element C or more other elements. Connections also include integrated connections and non-integrated connections. An integrated connection means that A and B are formed and connected as a single unit, while a non-integrated connection means that A and B are not formed and connected as a single unit.

[0022] The first sound-generating unit 30 and the second sound-generating unit 50 of the vibration sound-generating device 20 of this application are superimposed on each other. That is, the first sound-generating unit 30 and the second sound-generating unit 50 are assembled separately and then superimposed on each other. This makes the vibration sound-generating device 20 not required to be assembled in a certain order, resulting in high assembly flexibility, a simple structure, a simple process, and easy process control. Secondly, the first magnetic circuit structure 36 of the first sound-generating unit 30 acts solely on the first voice coil 35, and the second magnetic circuit structure 56 of the second sound-generating unit 50 acts solely on the second voice coil 55. Therefore, the two linear vibration systems use different magnetic circuits, and the magnetic circuit performance is not limited by the magnetic circuit architecture design. The magnetic field strength at the positions of the first voice coil 35 and the second voice coil 55 is respectively equivalent to the corresponding magnetic circuit strength. The magnetic circuit structure achieves dual magnetic circuit performance. Furthermore, the first sound-generating unit 30 and the second sound-generating unit 50 can work in superposition. If the audio current supplied to the first diaphragm 34 and the second diaphragm 54 can make the sound waves radiated by the first diaphragm 34 and the second diaphragm 54 in phase, the sound pressure of the first sound-generating unit 30 and the sound pressure of the second sound-generating unit 50 can be superimposed, strengthening and extending the overall low-frequency response of the vibration sound-generating device 20. If the audio current supplied to the first diaphragm 34 and the second diaphragm 54 can make the sound waves radiated by the first diaphragm 34 and the sound waves radiated by the second diaphragm 54 out of phase, the sound pressure of the first sound-generating unit 30 and the sound pressure of the second sound-generating unit 50 can be canceled out, thus silencing or reducing the sound of the vibration sound-generating device 20.

[0023] Compared to existing technologies where the front and rear outer diameters of the speaker are the same, making it difficult to assemble the speaker into the inner cavity of the earphone shell, the mounting surface of the speaker at the earphone head position is difficult to push further towards the earphone's sound outlet. Since the outer diameter of the end of the first bracket 32 ​​of the vibration-generating device 20 furthest from the second bracket 52 is smaller than the outer diameter of the second bracket 52, when the vibration-generating device 20 is installed into the receiving space 82 of the shell 80, the first bracket 32 ​​can retract inward to fit the earphone's position. This allows the first bracket 32 ​​to push towards the sound outlet 84 of the shell 80, facilitating the assembly of the vibration-generating device 20 into the inner cavity of the shell 80 and bringing the vibration-generating device 20 closer to the sound outlet 84. This not only promotes the miniaturization of the vibration-generating device 20 but also helps it get closer to the eardrum, improving the auditory experience.

[0024] like Figures 2-5As shown, the first diaphragm 34 and the second diaphragm 54 can be, but are not limited to, circular, elliptical, polygonal, or rounded rectangular membranes. The centerline of the first diaphragm 34 is collinear with the centerline of the second diaphragm 54. The orthographic projection of the first diaphragm 34 onto the second diaphragm 54 along the centerline is located within the surface area of ​​the second diaphragm 54 facing the first diaphragm 34, meaning the surface area of ​​the second diaphragm 54 is greater than or equal to the surface area of ​​the first diaphragm 34. Preferably, the surface area of ​​the second diaphragm 54 is greater than the surface area of ​​the first diaphragm 34. In this embodiment, both the first diaphragm 34 and the second diaphragm 54 are circular. The axis of the first diaphragm 34 is collinear with the axis of the second diaphragm 54. The outer diameter of the second diaphragm 54 can be the same as or different from the outer diameter of the first diaphragm, meaning the outer diameter of the second diaphragm 54 is greater than, equal to, or less than the outer diameter of the first diaphragm 34. Preferably, the diameter of the second diaphragm 54 is greater than the diameter of the first diaphragm 34, and the orthographic projection of the first diaphragm 34 onto the second diaphragm 54 along its axial direction is located within the area of ​​the second diaphragm 54.

[0025] Optionally, the first diaphragm 34 includes a first fixing member 340 and a first diaphragm portion 341 connected to the first fixing member 340. The first fixing member 340 is positioned on the side of the first bracket 32 ​​opposite to the second bracket 52. In this embodiment, the first fixing member 340 is a positioning ring. The first diaphragm portion 341 includes a first arcuate region 342 and a first folded region 344 located in its middle, and a first connecting region 346 connecting the first arcuate region 342 and the first folded region 344. The first folded region 344 is connected to the periphery of the first arcuate region 342 through the first connecting region 346. The first voice coil 35 is connected at the connection between the first arcuate region 342 and the first folded region 344, that is, one end of the first voice coil 35 is connected to the first connecting region 346. The outer periphery of the first folded region 344... Connected to the first fixing member 340, the axis of the first voice coil 35 is collinear with the axis of the first arc surface area 342; in this embodiment, the first arc surface area 342 is a spherical piece, and the first connecting areas 346 are all annular pieces. The outer edge of the first arc surface area 342 is connected to the inner circumferential surface of the annular piece, and the inner circumferential edge of the first fold area 344 is connected to the outer circumferential surface of the annular piece. Both the first arc surface area 342 and the first fold area 344 protrude to the side away from the second bracket 52, that is, both the first arc surface area 342 and the first fold area 344 protrude to the side away from the first voice coil 35.

[0026] Optionally, the second diaphragm 54 includes a second fixing member 540 and a second diaphragm portion 541 connected to the second fixing member 540. The second fixing member 540 is positioned on the side of the second bracket 52 facing the first bracket 32. The second diaphragm portion 541 includes a second arcuate region 542 and a second fold region 544 located in its middle, and a second connecting region 546 connecting the second arcuate region 542 and the second fold region 544. The second fold region 544 is connected to the periphery of the second arcuate region 542 through the second connecting region 546. Specifically, the outer periphery of the second arcuate region 542 is connected to the inner periphery of the second connecting region 546, the inner periphery of the second folded region 544 is connected to the outer periphery of the second connecting region 546, and the outer periphery of the second folded region 544 is connected to the second fixing member 540; one end of the second voice coil 55 is connected to the connection between the second arcuate region 542 and the second folded region 544, that is, one end of the second voice coil 55 is connected to the second connecting region 546, and the axis of the second voice coil 55 is collinear with the axis of the second arcuate region 542. In this embodiment, the second arcuate region 542 is a spherical sheet, and the second folded region 544 and the second connecting region 546 are both annular sheets. Both the second arcuate region 542 and the second folded region 544 protrude towards one side of the first bracket 32, that is, both the second arcuate region 542 and the second folded region protrude towards the side away from the second voice coil 55.

[0027] like Figures 3-5As shown, the first support 32 has a first inner cavity 320. The opposite ends of the first inner cavity 320 pass through the first front side 322 and the first back side 323 of the first support 32, respectively. The first magnetic circuit structure 36 is disposed in the first inner cavity 320. Specifically, the first inner cavity 320 includes a first receiving area 3201, a second receiving area 3203, a third receiving area 3204, and a fourth receiving area 3206 that are interconnected. The first receiving area 3201, the second receiving area 3203, the third receiving area 3204, and the fourth receiving area 3206 are arranged sequentially from the first front side 322 to the first back side 323. The first receiving area 3201 passes through the first front side 322, and the fourth receiving area 3206 passes through the first back side 323. The first diaphragm 34 is housed in the first receiving area 3201, the first magnetic circuit structure 36 is housed in the second receiving area 3203, the second diaphragm 54 is housed in the third receiving area 3204, and the end of the second support 52 near the second diaphragm 54 is housed in the fourth receiving area 3206. In this embodiment, the first receiving area 3201, the second receiving area 3203, the third receiving area 3204, and the fourth receiving area 3206 are all circular holes. The first receiving area 3201, the second receiving area 3203, the third receiving area 3204, and the fourth receiving area 3206 are coaxial. The inner diameter of the second receiving area 3203 is smaller than the inner diameter of the first receiving area 3201, the inner diameter of the fourth receiving area 3206 is larger than the inner diameter of the first receiving area 3201, and the inner diameter of the third receiving area 3204 is slightly smaller than the inner diameter of the fourth receiving area 3206. The first support 32 has a first fixing groove 324 on the inner circumferential surface of the first receiving area 3201. The first fixing member 340 can be positioned in the first fixing groove 324 to position the first diaphragm 34 on the first support 32. In this embodiment, the first fixing groove 324 is an annular groove.

[0028] The first support 32 has a first positioning groove 325 on the inner peripheral surface of the second receiving area 3203, which is used to position the first magnetic circuit structure 36. The first support 32 has a connecting groove 326 on the inner peripheral surface of the fourth receiving area 3206, which is used to position the second sound-emitting unit 50. In this embodiment, the connecting groove 326 is a second annular groove. The first support 32 has a sound outlet groove 327 and a first vent hole 328. The sound outlet groove 327 connects the first receiving area 3201 and the third receiving area 3204, and the first vent hole 328 connects the first receiving area 3201 and the outside of the first support 32. Specifically, the sound outlet groove 327 is located on the first front surface 322 of the first support 32, and the first vent hole 328 is located on the outer peripheral surface of the first support 32. The outer peripheral surface of the first support 32 has a first damping plate 329, which is breathable and covers the first vent hole 328. In this embodiment, the first vent hole 328 passes through the first bracket 32 ​​radially parallel to the first diaphragm 34 to prevent the first rear cavity 63 of the first sound-generating unit 30 from communicating with the second front cavity 65 of the second sound-generating unit 50. Optionally, multiple first vent holes 328 may be provided on the outer peripheral surface of the first bracket 32. The first damping sheet 329 may be made of, but is not limited to, a microporous material, a non-woven fabric, a mesh, etc.

[0029] like Figure 2 and Figure 3As shown, the first magnetic circuit structure 36 includes a first magnetic element 362, a first magnetic conductive element 364, and a first positioning element 365. The first magnetic conductive element 364 is attached to the surface of the first magnetic element 362 facing the first diaphragm 34. The first magnetic conductive element 364 and the first magnetic element 362 near the first magnetic conductive element 364 are housed in the inner cavity of the first voice coil 35. The first positioning element 365 is connected to the first bracket 32 ​​and housed in the first inner cavity 320. The side of the first magnetic element 362 facing away from the first magnetic conductive element 364 is connected to the first positioning element 365. Specifically, the first positioning element 365 may be, but is not limited to, a U-shaped magnetic shield, etc. The first positioning element 365 has a magnetic guiding function, and the first magnetic guiding element 364 is a magnetic plate attached to the first magnetic element 362. The first positioning element 365 includes a support portion 3652 and a positioning portion 3654 connected to the outer edge of the support portion 3652. The support portion 3652 and the positioning portion 3654 form a positioning space 3655. In this embodiment, the support portion 3652 is a circular support plate, and the positioning portion 3654 is a cylindrical positioning cylinder. The first magnetic element 362 is housed in the positioning space 3655 and is connected to the support portion 3652. The first magnetic conductive element 364 is attached to the surface of the first magnetic element 362 facing away from the support portion 3652. The outer peripheral surfaces of the first magnetic element 362 and the first magnetic conductive element 364 are spaced apart from the inner peripheral surface of the positioning portion 3654, forming an annular first magnetic gap 360. The end of the first voice coil 35 facing away from the first diaphragm 34 extends into the first magnetic gap 360. The first magnetic element 362 is a cylindrical magnet, and the first magnetic circuit structure 36 can generate magnetic lines of force passing through the first magnetic gap 360 to form a first magnetic field.

[0030] like Figure 3 and Figure 5As shown, the second bracket 52 has a second inner cavity 520. The opposite ends of the second inner cavity 520 pass through the second front side 522 and the second back side 523 of the second bracket 52, respectively. The second magnetic circuit structure 56 is disposed in the second inner cavity 520. Specifically, the second inner cavity 520 includes a first positioning area 5201 and a second positioning area 5203 that are interconnected. The first positioning area 5201 and the second positioning area 5203 are arranged sequentially from the second front side 522 to the second back side 523. The first positioning area 5201 passes through the second front side 522, and the second positioning area 5203 passes through the second back side 523. In this embodiment, both the first positioning area 5201 and the second positioning area 5203 are circular holes and are coaxial. A second fixing groove 524 is provided near the edge of the second front side 522 of the second bracket 52. The second fixing member 540 is positioned in the second fixing groove 524 so that the second diaphragm 54 is positioned on the second bracket 52. The second bracket 52 has a second positioning groove 525 on the inner peripheral surface of the first positioning area 5201, which is used to position the second magnetic circuit structure 56. The second bracket 52 has a second vent hole 526, which connects the first positioning area 5201 and the outside of the second bracket 52; specifically, the second vent hole 526 is located on the outer peripheral surface of the second bracket 52. A second damping sheet 527 is provided on the outer peripheral surface of the second bracket 52, covering the second vent hole 526, and the second damping sheet 527 is breathable. Optionally, multiple second vent holes 526 can be formed on the second bracket 52, and multiple second damping sheets 527 can cover multiple second vent holes 526 respectively. The second porous damping sheet can be made of, but is not limited to, microporous materials, non-woven fabric, mesh, etc. In other embodiments, the second damping sheet 527 can also be omitted.

[0031] The second magnetic circuit structure 56 includes a second magnetic element 562, a second magnetic conductive element 564, and a second positioning element 565. The second magnetic conductive element 564 is attached to the surface of the second magnetic element 562 facing the second diaphragm 54. The surface of the second magnetic element 562 facing away from the second magnetic conductive element 564 is connected to the second positioning element 565. The second positioning element 565 has a magnetic guiding function and is housed in the second positioning area 5203. The second positioning element 565 is connected to the second bracket 52. A second magnetic gap 560 passes through the second magnetic conductive element 564 and the second magnetic element 562. The end of the second voice coil 55 away from the second diaphragm 54 is housed in the second magnetic gap 560. The second magnetic circuit structure 56 has a first through hole 566 along the axis of the second diaphragm 54, through which the second magnetic conductive element 564, the second magnetic element 562, and the second positioning element 565 pass. Specifically, the second magnetic component 562 includes an outer ring magnet 5621 and an inner ring magnet 5623. The outer diameter of the inner ring magnet 5623 is smaller than the inner diameter of the outer ring magnet 5621. The inner ring magnet 5623 and the outer ring magnet 5621 are coaxially spaced and positioned on the second positioning component 565. The second magnetic conductive component 564 includes an outer magnetic conductive component 5641 and an inner magnetic conductive component 5643. Both the outer magnetic conductive component 5641 and the inner magnetic conductive component 5643 are magnetic rings. The outer diameter of the inner magnetic conductive component 5643 is smaller than the inner diameter of the outer magnetic conductive component 5641. The outer magnetic conductive component 5641 is attached to the outer ring magnet 5623. An outer ring magnet 5621 and an inner magnetic conductor 5643 are attached to the inner ring magnet 5623, with the outer magnetic conductor 5641 and the inner magnetic conductor 5643 spaced apart. A second magnetic gap 560 is formed between the assembly consisting of the outer ring magnet 5621 and the outer magnetic conductor 5641 and the assembly consisting of the inner ring magnet 5623 and the inner magnetic conductor 5643. A second positioning member 565 has a second through hole 5652 along its central portion. The second through hole 5652, the inner cavity of the inner ring magnet 5623, and the inner cavity of the inner magnetic conductor 5643 are interconnected to form a first through hole 566. Both the outer ring magnet 5621 and the inner ring magnet 5623 are axially magnetized. The second magnetic circuit structure 56 can generate magnetic lines of force passing through the second magnetic gap 560 to form a third magnetic field.

[0032] like Figure 2 and Figure 3As shown, the first bracket 32 ​​and the second bracket 52 are connected by a connecting groove and a connecting strip. The connecting groove is located on one of the first bracket 32 ​​and the second bracket 52, and the connecting strip is located on the other of the first bracket 32 ​​and the second bracket 52. In this embodiment, the inner circumferential surface of the first bracket 32 ​​is provided with a connecting groove 326. Specifically, the inner circumferential surface of the first inner cavity 320 of the first bracket 32 ​​near the second sound-emitting unit 50 is provided with a connecting groove 326; the end of the second bracket 52 facing the first bracket 32 ​​is provided with a connecting portion 528. Specifically, the outer periphery of the second bracket 52 near the first sound-emitting unit 30 is provided with an annular strip-shaped connecting portion 528, which can be positioned in the connecting groove 326. In other embodiments, the outer periphery of the first bracket 32 ​​near the second sound-emitting unit 50 is provided with a connecting strip, and the inner cavity 320 of the second bracket 52 near the first bracket 32 ​​is provided with a connecting groove, so that the connecting strip of the first bracket 32 ​​can be engaged with the connecting groove of the second bracket 52. The second sound-generating unit 50 also includes a third damping sheet 529, which covers the first through hole 566 of the second magnetic circuit structure 56 and is breathable. Specifically, the second positioning member 565 has a fixing groove 5654 on the periphery of the first through hole 566 on the surface opposite to the second magnetic member 562. The first through hole 566 connects to the fixing groove 5654, and the third damping sheet 529 is positioned in the fixing groove 5654.

[0033] Please see Figures 2-5When assembling the vibration sound-generating device 20, the first sound-generating unit 30 and the second sound-generating unit 50 are assembled separately. Specifically, when assembling the first sound-generating unit 30, the first magnetic component 362 is housed in the positioning space 3655 of the first positioning component 365 and connected to the support portion 3652. The first magnetic conductive component 364 is attached to the surface of the first magnetic component 362 away from the support portion 3652. The outer peripheral surfaces of the first magnetic component 362 and the first magnetic conductive component 364 and the inner peripheral surface of the positioning portion 3654 form a first magnetic gap 360. The path structure 36 is housed in the first inner cavity 320 of the first bracket 32, such that the positioning part 3654 is positioned in the first positioning groove 325, the side of the first magnetic conductor 364 away from the first magnetic component 362 is housed in the first receiving area 3201, and the first magnetic gap 360 connects to the first receiving area 3201; the first diaphragm 34 is housed in the first receiving area 3201 of the first bracket 32, such that the end of the first voice coil 35 away from the first diaphragm part 341 is inserted into the first magnetic gap 360, and the first fixing member 340 is positioned in the first fixing groove 324. Magnetic lines of force can be emitted from the back of the first magnetic element 362, pass through the support portion 3652 of the first positioning element 365, go along the positioning portion 3654 to the top of the positioning portion 3654, pass through the first magnetic gap 360 and return to the top of the first magnetic element 362 (i.e. the end near the first magnetic conductor 364); the first voice coil 35 generates a second magnetic field when audio current passes through it, and the second magnetic field of the first voice coil 35 interacts with the first magnetic field of the first magnetic circuit structure 36, driving the first voice coil 35 to vibrate so as to drive the first diaphragm portion 341 to vibrate and produce sound.

[0034] When assembling the second sound-generating unit 50, the inner ring magnet 5623 and the outer ring magnet 5621 are coaxially and spaced apart on the second positioning member 565, with the inner cavity of the inner ring magnet 5623 facing the second through hole 5652 of the second positioning member 565; the inner magnetic conductor 5643 is positioned on the surface of the inner ring magnet 5623 away from the second positioning member 565, and the outer magnetic conductor 5641 is positioned on the surface of the outer ring magnet 5621 away from the second positioning member 565, with the gap between the inner magnetic conductor 5643 and the outer magnetic conductor 5641 facing the gap between the inner ring magnet 5623 and the outer magnet 5621, so as to form a second magnetic gap 560. The second magnetic circuit structure 56 is housed in the second inner cavity 520, such that the outer periphery of the second magnetic conductor 564 is positioned in the second positioning groove 525 of the second bracket 52; the second diaphragm portion 541 and the second voice coil 55 are placed on the front side of the second bracket 52, such that the end of the second voice coil 55 away from the second diaphragm 54 is inserted into the second magnetic gap 560 of the second magnetic circuit structure 56, and the second fixing member 540 is positioned in the second fixing groove 524. The third damping plate 529 is positioned in the fixing groove 5654 of the second positioning member 565, such that the third damping plate 529 is directly opposite the first through hole 566 of the second magnetic circuit structure 56. Optionally, the magnetic lines of force of the second magnetic circuit structure 56 can originate from the bottom end of the inner magnet 5623 (i.e., the end near the second positioning member 565), pass sequentially through the second positioning member 565, the outer magnet 5621 and the outer magnetic conductor 5641, pass through the second magnetic gap 560, enter the inner magnet 5623 and return to the top of the inner magnet 5623. The second voice coil 55 generates a fourth magnetic field when an audio current passes through it. The fourth magnetic field of the second voice coil 55 interacts with the third magnetic field of the second magnetic circuit structure 56, causing the second voice coil 55 to vibrate, thereby driving the second diaphragm 54 to vibrate and produce sound.

[0035] When assembling the first sound-generating unit 30 and the second sound-generating unit 50, the first bracket 32 ​​and the second bracket 52 are combined to form a complete dual-unit structure. Specifically, the connecting part 528 of the second sound-generating unit 50 is snapped into the connecting groove 326 of the first bracket 32, so that the second fixing member 540 is clamped between the first bracket 32 ​​and the second bracket 52. Since the vibration sound-generating device 20 is assembled by first assembling the first sound-generating unit 30 and the second sound-generating unit 50 separately and then stacked together, the structure is simple, the assembly is convenient, and the assembly efficiency is improved. The rear cavity of the first sound-generating unit 30 has a first vent hole 328 opened in the radial direction to connect to the outside, so as to prevent the rear cavity of the first sound-generating unit 30 from communicating with the front cavity of the second sound-generating unit 50; the rear cavity of the second sound-generating unit 50 is connected to the outside by a second vent hole 526 opened on the side or a first through hole 566 opened on the back.

[0036] like Figure 2As shown, the side of the first diaphragm 34 facing away from the first voice coil 35 forms a first front cavity 61. The first diaphragm 34, the first magnetic circuit structure 36, and the first support 32 form a first rear cavity 63. The first front cavity 61 is isolated from the first rear cavity 63. The first voice coil 35 is housed in the first rear cavity 63. The first magnetic gap 360 connects to the first rear cavity 63. The end of the first voice coil 35 away from the first diaphragm 34 is inserted into the first magnetic gap 360. The first vent hole 328 connects the first rear cavity 63 to the outside of the first support 32. The second diaphragm 54, the first support 32, and the first magnetic circuit structure 36 form a second front cavity 65. The sound outlet groove 327 connects the first front cavity 61 and the second front cavity 65. The second diaphragm 54, the second support 52, and the second magnetic circuit structure 56 form the second rear cavity 67, which is isolated from the second front cavity 65. The second voice coil 55 is housed in the second rear cavity 67, and the second magnetic gap 560 connects to the second rear cavity 67. One end of the second voice coil 55 away from the second diaphragm 54 is inserted into the second magnetic gap 560. The first through hole 566 connects to the second rear cavity 67 and is directly opposite the middle of the second diaphragm 54. The second vent hole 526 connects to the outside of the second rear cavity 67 and the second support 52. Both the first vent hole 328 and the second vent hole 526 are away from the sound outlet groove 327. By adjusting the airflow of the first vent hole 328 and the second vent hole 526, the bass resonant frequency can be controlled, such as... Figure 2 As shown by the dashed arrow in the diagram. The first diaphragm 34 and the second diaphragm 54 are coaxial, and the diameter of the second diaphragm 54 is larger than the diameter of the first diaphragm 34. The first voice coil 35 and the second voice coil 55 are coaxial, and the inner diameters of the first voice coil 35 and the second voice coil 55 may be the same or different. In this embodiment, the inner and outer diameters of the first voice coil 35 are smaller than the inner and outer diameters of the second voice coil 55, respectively. In other embodiments, the inner diameter of the first voice coil 35 may be equal to or greater than the inner diameter of the second voice coil 55. When the first diaphragm 34 vibrates, the sound waves generated by the first diaphragm 34 radiate towards the first front cavity 61, such as... Figure 2 As shown by the short, solid arrow in the diagram; when the second diaphragm 54 vibrates, the sound waves generated by the second diaphragm 54 radiate outward from the sound outlet 327 through the first front cavity 61 via the second front cavity 65, as... Figure 2As shown by the solid arrow in the diagram. The sound wave radiation direction of the first diaphragm 34 is parallel to the axis of the first diaphragm 34, and the sound wave radiation direction of the first diaphragm 34 is the same as that of the second diaphragm 54. The sound wave radiation direction from the sound outlet 327 outward is the same as that of the first diaphragm 34. Understandably, both the first and second sound units 30 and 50 are mid-bass (full-range) units. The two mid-bass (full-range) units are combined by a bracket, specifically by the first bracket 32 ​​and the second bracket 52. The sound waves of the second sound unit 50 are radiated through the first bracket 32 ​​at the sound outlet 327 surrounding the first diaphragm 34, with the same sound wave radiation direction as the first sound unit 30. When the user puts the earphone head 100 on their ear, the sound waves from the first diaphragm 34 and the second diaphragm radiate outward on the same side of the earphone head 100 and are received by the user's eardrum. The rear cavity of the second unit is open to the outside through an opening on the side or back.

[0037] Optionally, the vibration-generating device 20 is further provided with a flexible circuit board (not shown) and a terminal block (not shown). The flexible circuit board is electrically connected to the terminal block, which is connected to an external circuit to provide audio current to the first voice coil 35 and the second voice coil 55. The flexible circuit board can be electrically connected to a system-in-package (SoC) chip to drive the first sound-generating unit 30 and the second sound-generating unit 50.

[0038] When using the vibration sound-generating device 20, an audio current is supplied to the first voice coil 35, which generates a second magnetic field that varies with the audio current. This second magnetic field interacts with the first magnetic field provided by the first magnetic circuit structure 36, causing the first voice coil 35 to vibrate with the audio current in the first magnetic field of the first magnetic circuit structure 36. The vibration of the first voice coil 35 drives the first diaphragm 34 to vibrate, thereby producing a sound with the same waveform as the original audio current. An audio current is supplied to the second voice coil 55, which generates a fourth magnetic field that varies with the audio current. This fourth magnetic field interacts with the third magnetic field provided by the second magnetic circuit structure 56, causing the second voice coil 55 to vibrate with the audio current in the third magnetic field of the second magnetic circuit structure 56. The vibration of the second voice coil 55 drives the second diaphragm 54 to vibrate, thereby producing a sound with the same waveform as the original audio current.

[0039] Optionally, audio current can be provided to the first voice coil 35 and the second voice coil 55 simultaneously, or audio current can be provided to the first voice coil 35 and the second voice coil 55 separately. The direction of the audio current provided to the first voice coil 35 can be the same as or opposite to the direction of the audio current provided to the second voice coil 55. The magnitude of the audio current provided to the first voice coil 35 can be the same as or different from the magnitude of the audio current provided to the second voice coil 55. The first sound unit 30 and the second sound unit 50 can output sounds of different frequencies respectively. Optionally, the first voice coil 35 vibrates at a first frequency to make the first sound unit 30 produce high-frequency and mid-frequency sounds; the second voice coil 55 vibrates at a second frequency to make the second sound unit 50 produce low-frequency sounds.

[0040] Optionally, both the first sound unit 30 and the second sound unit 50 can be used as mid-low frequency units and / or full-range units. The resonant frequencies of the first sound unit 30 and the second sound unit 50 can be defined separately according to the tuning requirements. Specifically, the first sound unit 30 is a mid-low frequency unit and the second sound unit 50 is a full-range unit; or the first sound unit 30 is a mid-low frequency unit and the second sound unit 50 is a mid-low frequency unit; or the first sound unit 30 is a full-range unit and the second sound unit 50 is a mid-low frequency unit; or the first sound unit 30 is a full-range unit and the second sound unit 50 is a full-range unit.

[0041] Optionally, the first sound-generating unit 30 and the second sound-generating unit 50 can be connected and driven together, or the first sound-generating unit 30 and the second sound-generating unit 50 can be driven separately. The vibration sound-generating device 20 is used in scenarios where the two sound-generating units require a rear cavity. In order to obtain high frequencies, the first diaphragm 34 is a full-range unit, which makes the high-frequency extension better. The first diaphragm 34 is a complete unit with good rigidity, and the sound wave radiation direction generated by the first diaphragm 34 is positive, that is, the sound wave of the first diaphragm 34 will be directly emitted, with small sound wave attenuation and sufficient energy.

[0042] In one application scenario, the first voice coil 35 and the second voice coil 55 are provided with audio currents in the same direction to drive the first diaphragm 34 and the second diaphragm 54 in the same orientation, so that the sound pressure of the first diaphragm 34 and the second diaphragm 54 is superimposed to increase the sound pressure. In another application scenario, the first voice coil 35 and the second voice coil 55 are provided with audio currents in opposite directions to drive the first diaphragm 34 and the second diaphragm 54 in opposite orientations, so that the sound pressure of the first diaphragm 34 and the second diaphragm 54 cancels out, thus reducing or muting the sound, enabling privacy processing. In other application scenarios, different signals or different operating frequency bands can be provided to the first sound unit 30 and the second sound unit 50 as needed, so that the first sound unit 30 and the second sound unit 50 can be used for frequency segmentation. For example, the operating frequency band of the first sound unit 30 is between 20K-200K, and the operating frequency of the second sound unit 50 is between 8K-10K. Therefore, different directions of signal and frequency band difference enhancement processing can be selected according to the needs of the actual scenario to drive the first sound unit 30 and the second sound unit 50 respectively.

[0043] In this application, the first sound-emitting unit 30 and the second sound-emitting unit 50 are used in combination. To achieve a certain sound pressure level, the first sound-emitting unit 30 and the second sound-emitting unit 50 work together, and they can share the sound pressure contribution. That is, to achieve the same sound pressure level, if a speaker with only one sound-emitting unit in the prior art requires a relatively large drive, while the first sound-emitting unit 30 and the second sound-emitting unit 50 in this application share the sound pressure, the drive required for each sound-emitting unit is smaller. If the vibration-generating device 20 needs to achieve a sound pressure level of 0.8V, since the first sound-generating unit 30 and the second sound-generating unit 50 work together, each sound-generating unit only needs 0.4V. This reduces the vibration and amplitude of the first sound-generating unit 30 and the second sound-generating unit 50, which can reduce distortion during high-dynamic applications of the first diaphragm 34 and the second diaphragm 54. The reduced amplitude of the first diaphragm 34 and the second diaphragm 54, combined with the joint operation of the first sound-generating unit 30 and the second sound-generating unit 50, achieves a higher sound pressure level with a smaller amplitude, which is beneficial to the reliability of the first diaphragm 34 and the second diaphragm 54 and reduces the risk of wire breakage. The first sound-generating unit 30 and the second sound-generating unit 50 can be adjusted as needed, operating at different frequencies. To adapt to different needs, the frequencies of the first sound-generating unit 30 and the second sound-generating unit 50 can be adjusted to different frequencies, resulting in better final performance of the vibration-generating device 20. Optionally, the frequency of the second diaphragm 54 of the second sound unit 50 is lower than that of the first diaphragm 34 of the first sound unit 30, so that the first sound unit 30 extends more in the high-frequency direction and the second sound unit 50 extends more in the low-frequency direction, and then they are spliced ​​together at an appropriate position.

[0044] The vibration-generating device 20 of this application is used in scenarios where low-frequency characteristics need to be enhanced and both sound-generating units require a rear cavity. Preferably, the vibration-generating device 20 is used in open-back headphones. The vibration-generating device 20 is placed close to the user's ear canal. Through the combination of the first bracket 32 ​​and the second bracket 52, the sound waves of the second sound-generating unit 50 radiate into the ear canal through the peripheral gap of the first sound-generating unit 30. The sound waves of the first sound-generating unit 30 and the second sound-generating unit 50 radiate outward on the same side of the vibration-generating device 20 and are received by the user's eardrum, thus improving the user experience.

[0045] like Figure 6 As shown, this application also provides an electronic device 300 employing the above-mentioned vibration sound-generating device. The electronic device 300 includes a housing 310, a motherboard 330, a battery 370, and a vibration sound-generating device 20. The motherboard 330, the battery 370, and the vibration sound-generating device 20 are all housed within the cavity of the housing 310. The battery 370 provides power to the motherboard 330 and the vibration sound-generating device 20. The motherboard 330 is electrically connected to the vibration sound-generating device 20. The vibration sound-generating device 20 is connected to the housing 310 via a mounting shell 350. The mounting shell 350 has a mounting cavity 352 and a sound outlet 354 communicating with the mounting cavity 352. The vibration sound-generating device 20 is housed within the mounting cavity 352. The first diaphragm 34 of the vibration sound-generating device 20 is directly opposite the sound outlet 354. The housing 310 is provided with a sound outlet 312 communicating with the sound outlet 354. The first sound-generating unit 30 is closer to the sound outlet 312 than the second sound-generating unit 50. The sound generated by the vibration sound-generating device 20 is discharged from the housing 310 through the sound outlet 354 and the sound outlet 312. The electronic device 300 may be, but is not limited to, a telephone, smartphone, tablet computer, computer, smart glasses, AR / VR device, hearing aid, etc.

[0046] In this application, the first sound-generating unit 30 and the second sound-generating unit 50 of the vibration sound-generating device 20 in the electronic device 300 are assembled separately and then superimposed on each other. This allows the vibration sound-generating device 20 to be assembled without a specific order, resulting in high assembly flexibility, a simple structure, simple manufacturing process, and easy process control. Secondly, the vibration sound-generating device 20 uses linear vibration systems with different magnetic circuits, which is not limited by the magnetic circuit architecture design and can achieve dual magnetic circuit performance. When the first sound-generating unit 30 and the second sound-generating unit 50 work together, when the first diaphragm 34 and the second diaphragm 50 are subjected to pressure, the vibration sound-generating device 20 can achieve high assembly flexibility, a simple structure, a simple manufacturing process, and easy process control. The audio current 4 can make the sound waves radiated by the first diaphragm 34 and the sound waves radiated by the second diaphragm 54 in the same direction, so that the sound pressure of the first sound unit 30 and the sound pressure of the second sound unit 50 can be superimposed, which strengthens and extends the low-frequency response of the vibration sound generating device 20; when the audio current is applied to the first diaphragm 34 and the second diaphragm 54, the sound waves radiated by the first diaphragm 34 and the sound waves radiated by the second diaphragm 54 are opposite, so that the sound pressure of the first sound unit 30 and the sound pressure of the second sound unit 50 can cancel each other, which can make the vibration sound generating device 20 have a noise reduction or sound reduction effect.

[0047] The above are the implementation methods of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications are also considered to be within the protection scope of the present utility model.

Claims

1. A vibration-generating sound device, characterized in that, The vibration sound-generating device includes: A first sound-emitting unit, comprising a first support, a first diaphragm, a first voice coil, and a first magnetic circuit structure. The periphery of the first diaphragm is connected to the first support. One end of the first voice coil is connected to the middle of the first diaphragm. The first magnetic circuit structure is disposed on the first support and spaced apart from the first diaphragm. The first magnetic circuit structure has a first magnetic gap. The end of the first voice coil away from the first diaphragm is accommodated in the first magnetic gap. The second sound-producing unit includes a second support, a second diaphragm, a second voice coil, and a second magnetic circuit structure. The periphery of the second diaphragm is connected to the second support, one end of the second voice coil is connected to the middle of the second diaphragm, the second magnetic circuit structure is disposed on the second support, the second magnetic circuit structure is spaced apart from the second diaphragm, the second magnetic circuit structure has a second magnetic gap, and the end of the second voice coil away from the second diaphragm is accommodated in the second magnetic gap; the first support is connected to the second support.

2. The vibration-generating sound device according to claim 1, characterized in that, The orthogonal projection of the first diaphragm onto the second diaphragm along the axial direction is located in the surface region of the second diaphragm facing the first diaphragm.

3. The vibration-generating sound device according to claim 1, characterized in that, The first bracket and the second bracket are connected by a connecting groove and a connecting strip. The connecting groove is provided in one of the first bracket and the second bracket, and the connecting strip is provided in the other of the first bracket and the second bracket.

4. The vibration-generating sound device according to claim 3, characterized in that, The connecting groove is located on the inner circumferential surface of the first bracket, and the connecting strip is located on the end of the second bracket facing the first bracket.

5. The vibration-generating sound device according to claim 1, characterized in that, The first diaphragm includes a first fixing member and a first diaphragm portion connected to the first fixing member, the first fixing member being positioned on the side of the first bracket away from the second bracket; the second diaphragm includes a second fixing member and a second diaphragm portion connected to the second fixing member, the second fixing member being positioned on the side of the second bracket facing the first bracket.

6. The vibration-generating sound device according to claim 5, characterized in that, The first diaphragm portion includes a first arcuate region and a first folded region located in its middle portion, and a first connecting region connecting the first arcuate region and the first folded region. The first folded region is connected to the periphery of the first arcuate region, and the outer periphery of the first folded region is connected to the first fixing member. The first voice coil is connected to the first connecting region. Both the first arcuate region and the first folded region protrude to the side away from the first voice coil.

7. The vibration-generating sound device according to claim 5, characterized in that, The second diaphragm includes a second arcuate region and a second folded region located in its middle. The second folded region is connected around the second arcuate region. The second voice coil is connected at the junction of the second arcuate region and the second folded region. The outer periphery of the second folded region is connected to the second fixing member.

8. The vibration-generating sound device according to claim 1, characterized in that, The axis of the first diaphragm is collinear with the axis of the second diaphragm, the first voice coil is collinear with the second voice coil, and the inner diameter of the first voice coil may be the same as or different from the inner diameter of the second voice coil.

9. The vibration-generating sound device according to claim 1, characterized in that, The first diaphragm forms a first front cavity on the side opposite to the first voice coil, and the first diaphragm, the first magnetic circuit structure, and the first support form a first rear cavity; the second diaphragm, the first support, and the first magnetic circuit structure form a second front cavity, and the second diaphragm, the second support, and the second magnetic circuit structure form a second rear cavity.

10. The vibration-generating sound device according to claim 9, characterized in that, The first bracket has a sound outlet groove that connects the first front cavity and the second front cavity, and the sound waves from the vibration of the second diaphragm radiate outward from the sound outlet groove through the second front cavity.

11. The vibration-generating sound device according to claim 10, characterized in that, The sound wave radiation direction of the first diaphragm vibration is parallel to the axis of the first diaphragm, and the sound wave radiation direction of the first diaphragm vibration is consistent with the sound wave radiation direction of the second diaphragm vibration.

12. The vibration-generating sound device according to claim 10, characterized in that, The first bracket is provided with a first vent hole, which connects the first rear cavity to the outside of the first bracket; the second bracket is provided with a second vent hole, which connects the second rear cavity to the outside of the second bracket; both the first vent hole and the second vent hole are far away from the sound outlet groove.

13. The vibration-generating sound device according to claim 1, characterized in that, The first magnetic circuit structure includes a first magnetic element and a first magnetic conductive element. The first magnetic conductive element is attached to the surface of the first magnetic element facing the first diaphragm. The first magnetic conductive element and a first magnetic element close to the first magnetic conductive element are housed in the inner cavity of the first voice coil.

14. The vibration-generating sound device according to claim 13, characterized in that, The first bracket has a first inner cavity, and the first magnetic circuit structure further includes a first positioning member, which is housed in the first inner cavity and connected to the first bracket; the side of the first magnetic member facing away from the first magnetic conductive member is connected to the first positioning member.

15. The vibration-generating sound device according to claim 1, characterized in that, The second magnetic circuit structure includes a second magnetic element and a second magnetic conductive element. The second magnetic conductive element is attached to the surface of the second magnetic element facing the second diaphragm, and the second magnetic gap passes through the second magnetic conductive element and the second magnetic element.

16. The vibration-generating sound device according to claim 15, characterized in that, The second bracket has a second inner cavity, and the second magnetic circuit structure further includes a second positioning member. The second positioning member is housed in the second inner cavity and connected to the second bracket. The surface of the second magnetic member facing away from the second magnetic conductive member is connected to the second positioning member. The second magnetic circuit structure has a through hole along the axis of the second diaphragm, and the through hole passes through the second magnetic conductive member, the second magnetic member, and the second positioning member.

17. The vibration-generating sound device according to claim 1, characterized in that, Both the first sound-emitting unit and the second sound-emitting unit are mid-low frequency units and / or full-frequency units, and the resonant frequencies of the first sound-emitting unit and the second sound-emitting unit can be defined respectively.

18. The vibration-generating sound device according to claim 1, characterized in that, The first sound unit and the second sound unit can be connected and driven together, or the first sound unit and the second sound unit can be driven separately; the superposition of the first sound unit and the second sound unit can increase the sound pressure, or can cancel each other out.

19. An electronic device, characterized in that, The electronic device includes a housing, a motherboard, and a vibration-generating device as described in any one of claims 1-18. The main body and the vibration-generating device are housed in the inner cavity of the housing. The motherboard is electrically connected to the vibration-generating device. The housing is provided with a sound outlet hole, and the sound generated by the vibration-generating device is discharged from the housing through the sound outlet hole.

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