Vibroacoustic device and electronic device

Abstract

The application discloses a vibrating acoustic device and an electronic device, and belongs to the technical field of electronic devices. In the vibrating acoustic device, a first diaphragm, a second diaphragm and a driving magnet are all mounted on a shell; the shell is provided with a sound outlet, and the front cavity sides of the first diaphragm and the second diaphragm are both communicated with the sound outlet; a first voice coil is connected with the first diaphragm, and the driving magnet is used for driving the first diaphragm to reciprocate in a first direction; a second voice coil is connected with the second diaphragm, and a magnet assembly is used for driving the second diaphragm to reciprocate in the first direction; in the first direction, the orthographic projection area of the second diaphragm is greater than the orthographic projection area of the first diaphragm, and at least part of the orthographic projection of the first diaphragm is located in the orthographic projection of the second diaphragm; in a second direction, a first one of the magnet assembly and the vibrating coil is movably connected with the shell, and a second one is mounted on the shell; the magnet assembly is further used for cooperating with the vibrating coil to make the first one reciprocate in the second direction, and the second direction intersects with the first direction.

Description

Technical Field

[0001] This application belongs to the field of electronic equipment technology, specifically relating to a vibration acoustic device and an electronic device. Background Technology

[0002] Speakers and linear motors are crucial components in electronic devices such as mobile phones. In related technologies, speakers and linear motors are generally two independent devices. Furthermore, to achieve relatively wide-frequency sound output, separate high-frequency and low-frequency speakers are typically required. This necessitates the use of multiple components to achieve both wide-frequency sound and vibration capabilities, which occupies significant internal space and hinders the development of thinner and smaller electronic devices. Summary of the Invention

[0003] The purpose of this application is to provide a vibration acoustic device and an electronic device to solve the problem that in current electronic devices, in order to have both wideband sound and vibration functions, multiple components are required, which occupies a large amount of internal installation space in the electronic device and is not conducive to the development of electronic devices towards thinner and smaller designs.

[0004] In a first aspect, embodiments of this application disclose a vibratory acoustic device, which includes a housing, a first vibrating unit, a second vibrating unit, and a vibrating coil, wherein... The first vibration unit includes a first diaphragm, a first voice coil, and a driving magnet; the second vibration unit includes a second diaphragm, a magnet assembly, and a second voice coil; the first diaphragm, the second diaphragm, and the driving magnet are all mounted on the housing. The housing is provided with a sound outlet, and the front cavity sides of the first diaphragm and the second diaphragm are both connected to the sound outlet; the first voice coil is connected to the first diaphragm, and the driving magnet is used to drive the first voice coil to cause the first diaphragm to reciprocate in a first direction; the second voice coil is connected to the second diaphragm, and the magnet assembly is used to drive the second voice coil to cause the second diaphragm to reciprocate in the first direction; In the first direction, the projected area of ​​the second diaphragm is larger than the projected area of ​​the first diaphragm, and at least a portion of the projected area of ​​the first diaphragm is located within the projected area of ​​the second diaphragm. In a second direction, the first of the magnet assembly and the vibration coil is movably connected to the housing, the second of the magnet assembly and the vibration coil is mounted on the housing, and the magnet assembly is also used to cooperate with the vibration coil to cause the first one to reciprocate along the second direction, the second direction intersecting the first direction.

[0005] Secondly, embodiments of this application disclose an electronic device, which includes a device body and the aforementioned vibratory acoustic device, wherein the vibratory acoustic device is mounted on the device body.

[0006] This application discloses a vibratory acoustic device, the housing of which has a sound outlet. The front cavity sides of the first diaphragm in the first vibration unit and the second diaphragm in the second vibration unit are both connected to the sound outlet, and both the first diaphragm and the second diaphragm are mounted on the housing. The first voice coil is connected to the first diaphragm, and under the action of the driving magnet, it can drive the first voice coil to drive the first diaphragm to reciprocate in a first direction to generate sound waves. At the same time, the second voice coil is connected to the second diaphragm, and under the action of the magnet assembly, it can drive the second voice coil to drive the second diaphragm to reciprocate in a first direction to generate sound waves. The sound waves generated by the first diaphragm and the second diaphragm can be transmitted to the outside of the housing through the sound outlet.

[0007] Furthermore, in the vibratory acoustic device of this application, in the second direction, the first of the magnet assembly used to drive the second diaphragm to vibrate in the vibrating coil and the second vibrating unit is movably connected to the housing, and the second of the vibrating coil and the magnet assembly is installed in the housing. The magnet assembly can also cooperate with the vibrating coil, so that in the second direction, the first of the vibrating coil and the magnet assembly can reciprocate along the second direction, which makes the vibratory acoustic device have the vibration capability of a linear motor.

[0008] Furthermore, in the vibratory acoustic device of this application, in the first direction, the projected area of ​​the second diaphragm is larger than that of the first diaphragm. This allows the second diaphragm to emit a frequency lower than that of the first diaphragm, thereby giving the vibratory acoustic device a relatively wider frequency range and improving its sound production effect. Simultaneously, in the first direction, at least a portion of the projected area of ​​the first diaphragm lies within the projected area of ​​the second diaphragm, so that the first and second diaphragms at least partially overlap in the first direction. This results in a more compact arrangement between the first and second vibration units in the direction perpendicular to the first direction, and allows for a more appropriate reduction in the overall size of the vibratory acoustic device in the direction perpendicular to the first direction, minimizing the space occupied by the vibratory acoustic device in the corresponding direction within the electronic device. Attached Figure Description

[0009] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is an exploded view of the vibratory acoustic device disclosed in the embodiments of this application; Figure 2 This is a cross-sectional schematic diagram of the vibrating acoustic device disclosed in the embodiments of this application; Figure 3 This is a schematic diagram of a portion of the structure of the vibrating acoustic device disclosed in the embodiments of this application; Figure 4 This is a cross-sectional view of a portion of the structure of the vibratory acoustic device disclosed in the embodiments of this application, including a first vibration unit and a second vibration unit. Figure 5 This is a cross-sectional schematic diagram of a portion of the structure of the vibratory acoustic device disclosed in the embodiments of this application, including the first vibration unit. Figure 6 This is a cross-sectional schematic diagram of a portion of the structure of the vibratory acoustic device disclosed in the embodiments of this application, including a second vibration unit. Figure 7 This is a schematic diagram of the assembly between the second voice coil and the second diaphragm in the vibrating acoustic device disclosed in the embodiments of this application.

[0010] Figure label: 100 - Housing, 101 - Sound outlet, 102 - Inner cavity, 110 - First housing, 120 - Second housing 210-Basin stand, 211-Frame, 212-Magnetic back plate, 220-Mounting base, 221-Mounting plate, 2211-Allowing hole, 2212-Mounting hole, 222-First extension plate, 223-Second extension plate 300 - First vibrating unit, 310 - First diaphragm, 311 - First spherical top, 312 - First surround, 320 - First voice coil, 330 - Driving magnet, 340 - First magnetic plate. 400 - Second vibrating unit; 410 - Second diaphragm; 411 - Second spherical top; 412 - Second surround; 420 - Magnet assembly; 421 - First magnet; 422 - Second magnet; 423 - Third magnet; 430 - Magnetic guide assembly; 431 - Central magnetic guide plate; 432 - Second magnetic guide plate; 433 - Third magnetic guide plate; 440 - Second voice coil; 450 - Connecting frame. 500-Vibration Coil 610 - Flexible connector, 620 - Flexible seal. Detailed Implementation

[0011] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0012] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0013] like Figures 1-7 As shown in the embodiments, this application discloses a vibratory acoustic device and an electronic device. The vibratory acoustic device disclosed in this application can generate sound by vibrating a diaphragm, and can also cause other devices to vibrate reciprocally to provide the vibration effect of a linear motor. In addition, the vibratory acoustic device disclosed in this application includes a first diaphragm 310 and a second diaphragm 410, wherein the frequency of the sound emitted by the second diaphragm 410 is lower than the frequency of the sound emitted by the first diaphragm 310, thereby enabling the vibratory acoustic device to achieve wideband sound generation. Of course, the vibratory acoustic device disclosed in this application can be applied to electronic devices, which may specifically include mobile phones and tablet computers, etc., which will not be listed here.

[0014] Figure 1 This is an exploded view of the vibratory acoustic device disclosed in the embodiments of this application. As shown, the vibratory acoustic device disclosed in the embodiments of this application includes a housing 100, a first vibration unit 300, a second vibration unit 400, and a vibration coil 500.

[0015] The housing 100 serves as the basic structure for the vibrating acoustic device. The housing 100 has an inner cavity 102, within which the first vibration unit 300, the second vibration unit 400, and the vibration coil 500 are all installed. This allows the housing 100 to act as the mounting base for these components and also provides protection for them. Specifically, the housing 100 can be formed from a hard material such as metal, and its shape and size can be flexibly selected according to actual conditions; this document does not impose any limitations on this. Furthermore, for ease of processing and assembly, the housing 100 may include a separately formed first housing 110 and a second housing 120, wherein the first housing 110 and the second housing 120 are distributed and interconnected in a first direction.

[0016] Meanwhile, in order to ensure that the sound emitted by the first vibration unit 300 and the second vibration unit 400 can propagate outside the housing 100, such as Figure 1 As shown, the housing 100 is provided with a sound outlet 101.

[0017] As described above, both the first vibration unit 300 and the second vibration unit 400 are used to generate sound by vibrating the diaphragm. Therefore, in this application, the first vibration unit 300 includes a first diaphragm 310, and the second vibration unit 400 includes a second diaphragm 410. Both the first diaphragm 310 and the second diaphragm 410 are mounted on the housing 100, and the front cavity sides of both the first diaphragm 310 and the second diaphragm 410 are connected to the sound outlet 101. Both the first diaphragm 310 and the second diaphragm 410 are used to reciprocate in a first direction, so that the sound waves generated by the vibration of the first diaphragm 310 and the second diaphragm 410 can be propagated from the front cavity sides of the first diaphragm 310 and the second diaphragm 410 to the outside of the housing 100 through the sound outlet 101.

[0018] The outer peripheral edge regions of the first diaphragm 310 and the second diaphragm 410 can be installed on the housing 100 by means of bonding or other methods. Of course, in order to ensure that the first diaphragm 310 and the second diaphragm 410 can vibrate normally, in the vibrating acoustic device disclosed in this application embodiment, the first vibration unit 300 also includes a first voice coil 320 and a driving magnet 330. The first voice coil 320 is connected to one side surface of the first diaphragm 310. Generally, the side where the first voice coil 320 is located is the rear cavity side of the first diaphragm 310. Correspondingly, the side of the first diaphragm 310 away from the first voice coil 320 is the front cavity side of the first diaphragm 310.

[0019] Meanwhile, the driving magnet 330 is also mounted on the housing 100. By designing the relative positions of the driving magnet 330 and the first voice coil 320, the first voice coil 320 can be positioned within the magnetic field of the driving magnet 330. When an alternating current is passed through the first voice coil 320, it can drive the first diaphragm 310 to reciprocate along its thickness direction under the action of the Ampere force. That is, in this application, the first diaphragm 310, the second diaphragm 410, and the driving magnet 330 are all mounted on the housing 100. Of course, the connection between the aforementioned three components and the housing 100 can be direct or indirect, and this is not limited herein.

[0020] The thickness direction of the first diaphragm 310 is the first direction; more intuitively, the first direction can be... Figure 4 The direction M in the middle, and the second direction mentioned below can be Figure 4 The direction N in the middle.

[0021] As described above, the first voice coil 320 is connected to the first diaphragm 310, and the driving magnet 330 drives the first voice coil 320 to reciprocate in the first direction M. To improve the cooperation between the driving magnet 330 and the first voice coil 320, and thus enhance the stability of the Ampere force on the first voice coil 320, in a specific embodiment of this application, the first vibration unit 300 may further include a first magnetic guide sheet 340. The first magnetic guide sheet 340 is located on the side of the driving magnet 330 facing the first diaphragm 310. The first magnetic guide sheet 340 can guide and restrict the direction of the magnetic field lines of the driving magnet 330, so that the magnetic field lines of the driving magnet 330 propagate within the first magnetic guide sheet 340. Based on this, the first voice coil 320 can surround the outer periphery of the first magnetic guide sheet 340, so that the magnetic field lines propagating through the first magnetic guide sheet 340 pass through the first voice coil 320 in a direction perpendicular to the first direction, thereby further improving the stability of the Ampere force on the first voice coil 320.

[0022] Figure 5 This is a cross-sectional schematic diagram of a portion of the structure of the vibratory acoustic device in this application, including the first vibration unit 300. Figure 5 Taking the portion of the first voice coil 320 located on the left side of the first magnetic plate 340 as an example, the propagation direction of the magnetic field lines in the region where the aforementioned left portion of the first voice coil 320 is located is parallel to the second direction, and the direction of the current flowing through the aforementioned portion of the first voice coil 320 is perpendicular to the plane of the paper. This makes the direction of the Ampere force on the aforementioned left portion of the first voice coil 320 parallel to the first direction. Correspondingly, the direction of the Ampere force on the portion of the first voice coil 320 located on the right side of the first magnetic plate is the same as that on the aforementioned left portion, and will not be repeated here.

[0023] As described above, the first diaphragm 310 is mounted on the housing 100. In order to ensure that the first diaphragm 310 can be stably mounted inside the housing 100 and that the first diaphragm 310 and the surface of the housing 100 are spaced apart to form a vibration space for the first diaphragm 310, in a specific embodiment of this application, the vibrating acoustic device includes a frame 210, and the first diaphragm 310 is mounted on the frame 210, that is, the periphery of the first diaphragm 310 is connected to the frame 210.

[0024] Figure 4 This is a cross-sectional schematic diagram of the vibratory acoustic device disclosed in the embodiments of this application, based on... Figure 4 and Figure 5In this application, the basin frame 210 is generally basin-shaped or bowl-shaped. The first diaphragm 310 is installed at the opening of the basin frame 210, and the space enclosed by the first diaphragm 310 and the basin frame 210 is the rear cavity of the first diaphragm 310. Correspondingly, the other side of the first diaphragm 310 is the front cavity of the first diaphragm 310. More specifically, the first diaphragm 310 includes a first dome 311 and a first folded ring portion 312. The first folded ring portion 312 is generally annular and surrounds and connects to the outer periphery of the first dome 311. During the installation of the first diaphragm 310, the first diaphragm 310 and the housing 100 (and the basin frame 210) can be stably assembled by connecting the first folded ring portion 312 to the basin frame 210. The first dome 311 faces the recessed space of the basin frame 210 to ensure that the basin frame 210 can provide vibration avoidance space for the first dome 311.

[0025] Based on the above structure, in order to further improve the control effect on the propagation path of the magnetic field lines of the driving magnet 330, in a specific embodiment of this application, the frame 210 may include a frame 211 and a magnetic back plate 212. The frame 211 is connected to the housing 100, the magnetic back plate 212 is connected to the frame 211, and the first diaphragm 310 is mounted on the frame 211. Meanwhile, the driving magnet 330 of the first vibration unit 300 is mounted on the side of the magnetic back plate 212 facing the first diaphragm 310. In this case, since the first magnetic sheet 340 and the magnetic back plate 212 are respectively provided on the opposite sides of the driving magnet 330, the propagation path of the magnetic field lines of the driving magnet 330 can be further precisely controlled, thereby further improving the sound production effect of the first diaphragm 310.

[0026] As described above, the frame 210 is connected to the housing 100. Typically, the outer edge of the frame 210 can be connected to the inner wall of the housing 100. In order to ensure that the sound emitted by the first diaphragm 310 can be transmitted from the sound outlet 101 to the outside of the housing 100, a portion of the outer edge of the frame 210 needs to be spaced apart from the housing 100. In other words, a portion of the circumferential outer edge of the frame 210 is connected to the housing 100 to ensure that the frame 210 can form a stable assembly relationship with the housing 100. At the same time, other portions of the circumferential edge of the frame 210 are spaced apart from the housing 100 so that the front cavity side of the first diaphragm 310 can still communicate with the sound outlet 101 of the housing 100 through the aforementioned space between the frame 210 and the housing 100.

[0027] As described above, in the vibratory acoustic device disclosed in the embodiments of this application, the second vibration unit 400 also generates sound by vibrating the diaphragm. In detail, in this application, the second vibration unit 400 includes a second diaphragm 410 and a magnet assembly 420. The second diaphragm 410 is mounted on the housing 100, and the front cavity side of the second diaphragm 410 is connected to the sound outlet 101. The magnet assembly 420 is used to drive the second diaphragm 410 to reciprocate in a first direction. Similarly, the sound waves generated by the vibration of the second diaphragm 410 can propagate from the front cavity side of the second diaphragm 410 through the sound outlet 101 to the outside of the housing 100.

[0028] To ensure that the second diaphragm 410 can also be stably installed within the housing 100, and that the second diaphragm 410 is spaced apart from the inner wall of the housing 100, in a specific embodiment of this application, the vibrating acoustic device may include a mounting base 220 located within the housing 100, and the second diaphragm 410 is mounted on the mounting base 220. More specifically, the mounting base 220 may have a mounting hole 2212, and the second diaphragm 410 is mounted at the mounting hole 2212. Simultaneously, the second diaphragm 410 includes a second spherical top 411 and a second folded ring portion 412, wherein the second folded ring portion 412 is generally a ring-shaped structure, and the second folded ring portion 412 surrounds and connects to the outer periphery of the second spherical top 411. By mounting the second folded ring portion 412 on the outer periphery of the mounting hole 2212, and making the second spherical top 411 opposite to the mounting hole 2212, it can be ensured that the second spherical top 411 can reciprocate within the mounting hole 2212.

[0029] Of course, the second vibration unit 400 may also include a second voice coil 440, which can be connected to one side surface of the second diaphragm 410. By designing parameters such as the positional relationship between the second voice coil 440 and the magnet assembly 420, when an alternating current is passed through the second voice coil 440, the magnet assembly 420 can drive the second voice coil 440 to reciprocate in the first direction. The interaction between the second voice coil 440 and the magnet assembly 420 can be referred to as the interaction between the first voice coil 320 and the driving magnet 330, and will not be repeated here.

[0030] As described above, the second diaphragm 410 is mounted on the mounting base 220, and the second voice coil 440 can also be indirectly mounted on the mounting base 220 by connecting to the second diaphragm 410. Based on this, in order to improve the fitting accuracy between the second voice coil 440 and the magnet assembly 420, in a specific embodiment of this application, the magnet assembly 420 can also be mounted on the mounting base 220. In this case, if the vibration process of the second diaphragm 410 is not considered, the mounting base 220, the second diaphragm 410, the second voice coil 440 and the magnet assembly 420 are all relatively stationary.

[0031] As described above, both the first diaphragm 310 and the second diaphragm 410 can reciprocate in the first direction to generate sound, and the sound can propagate beyond the vibrating acoustic device through the sound outlet 101. Based on this, in order to expand the frequency range of the vibrating acoustic device disclosed in this application embodiment, and thereby improve the sound generation effect of the vibrating acoustic device, in this application embodiment, such as... Figure 1 and Figure 4 As shown, in the first direction, the projected area of ​​the second diaphragm 410 is larger than that of the first diaphragm 310. In this case, the vibration area of ​​the second diaphragm 410 is larger than that of the first diaphragm 310, resulting in a relatively lower vibration frequency for the second diaphragm 410 compared to the first diaphragm 310. In other words, in the vibrating acoustic device disclosed in this application embodiment, the first vibration unit 300 is a tweeter, and the second vibration unit 400 is a woofer.

[0032] Furthermore, in order to appropriately reduce the overall size of the vibratory acoustic device in the direction perpendicular to the first direction, in the vibratory acoustic device disclosed in the embodiments of this application, such as... Figure 1 and Figure 4 As shown, in the first direction, at least a portion of the orthographic projection of the first diaphragm 310 can be located within the orthographic projection of the second diaphragm 410. Intuitively, as... Figure 4 As shown in this application, the first diaphragm 310 and the second diaphragm 410 are arranged to overlap at least partially in a first direction.

[0033] In this embodiment, the first vibration unit 300 and the second vibration unit 400 are stacked in a first direction. Based on this, to ensure that the front cavity sides of both the first vibration unit 300 and the second vibration unit 400 can communicate with the sound outlet 101, such as... Figure 1 and Figure 4 As shown, in the first direction, the sound outlet 101 is located on the side of the housing 100 and faces the first diaphragm 310.

[0034] As described above, the vibratory acoustic device disclosed in this application also possesses the vibration capability of a linear motor. In detail... Figure 2 and Figure 3A schematic diagram of a portion of the structure of the vibratory acoustic device disclosed in this application is shown. In the second direction, the first of the magnet assembly 420 and the vibration coil 500 is movably connected to the housing 100, and the second of the magnet assembly 420 and the vibration coil 500 is mounted on the housing 100. Furthermore, the magnet assembly 420 in the second vibration unit 400, in addition to driving the second diaphragm 410 to vibrate, also cooperates with the vibration coil 500 to drive the vibration coil 500 and the first magnet assembly 420 movably connected to the housing 100 to reciprocate along the second direction. The second direction intersects the first direction; furthermore, the second direction can be perpendicular to the first direction. This can reduce the assembly difficulty between components in the vibratory acoustic device and, to a certain extent, improve the compactness of the internal components of the vibratory acoustic device.

[0035] As described above, in this application, one of the vibration coil 500 and the magnet assembly 420 that is movably connected to the housing 100 is used as an oscillator, and under the interaction of the two, the oscillator can reciprocate relative to the housing 100 in the second direction, thereby providing the vibration effect of a linear motor.

[0036] More in detail, such as Figure 3 As shown, the vibrating coil 500 and the magnet assembly 420 are also arranged in a corresponding manner, so that the vibrating coil 500 is located in the magnetic field of the magnet assembly 420. Figure 3 Taking the orientation of the structure shown in the figure as an example, in Figure 3 When an alternating current is passed through the rightmost vibrating coil 500, the left half of this vibrating coil 500 corresponds to the magnet assembly 420. The direction of the current in the left half of the vibrating coil 500 is perpendicular to the plane of the paper, and the direction of the magnetic field lines in the region where the left half of the vibrating coil 500 is located is vertical. In this case, based on the left-hand rule, the direction of the Ampere force on the left half of the vibrating coil 500 is parallel to the left-right direction. The left-right direction and the vertical direction are both considered secondary directions.

[0037] Of course, in this application, the magnet assembly 420 may only include the magnet corresponding to the aforementioned left half of the vibration coil 500, referred to as the first magnet 421. In this case, the number of vibration coils 500 may be one. Furthermore, the number of vibration coils 500 corresponding to the aforementioned first magnet 421 may also be two, and as... Figure 3As shown, the left half of one of the two vibration coils 500 can be aligned with the right side of the first magnet 421, and the right half of the other can be aligned with the left side of the first magnet 421. Furthermore, the alternating current flowing through the two vibration coils 500 can be in the same direction to ensure that the two vibration coils 500 interact with the first magnet 421 in the same direction.

[0038] To further enhance the interaction between the vibration coil 500 and the magnet assembly 420, in another embodiment of this application, one vibration coil 500 can simultaneously correspond to two magnets. Details are as follows... Figure 3 As shown, the magnet assembly 420 can include a first magnet 421 and a second magnet 422, wherein, in a second direction, the first magnet 421 and the second magnet 422 are spaced apart, and in a first direction, a portion of the vibration coil 500 is opposite to the first magnet 421, and another portion of the vibration coil 500 is opposite to the second magnet 422. Furthermore, to ensure that the force acting on different positions within the same vibration coil 500 is the same, in this application, the magnetic poles of the first magnet 421 and the second magnet 422 facing the vibration coil 500 have opposite polarities.

[0039] More intuitively, still based on Figure 3 Taking the vibration coil 500 located on the far right as an example, when an alternating current is passed through it, the left half of the vibration coil 500 corresponds to the first magnet 421 in the magnet assembly 420, and the right half of the vibration coil 500 corresponds to the second magnet 422 in the magnet assembly 420. The directions of the alternating current in the left and right halves of the vibration coil 500 are opposite, and the polarities of the first magnet 421 and the second magnet 422 facing the magnetic poles of the vibration coil 500 are also opposite. In this case, the left and right halves of the vibration coil 500 are subjected to the same force direction, which can improve the interaction between the vibration coil 500 and the magnet assembly 420 in the second direction and enhance the vibration sensation.

[0040] To further enhance the interaction between the vibrating coil 500 and the magnet assembly 420, optionally, as follows: Figure 3As shown, the magnet assembly 420 may further include a third magnet 423, and in the second direction, the third magnet 423 is spaced apart from the side of the first magnet 421 facing away from the second magnet 422. In this case, the number of vibration coils 500 corresponding to the same magnet assembly 420 can be at least two, and two of the plurality of vibration coils 500 are spaced apart along the second direction. Furthermore, one of the two vibration coils 500 is located in the region between the first magnet 421 and the second magnet 422, and this vibration coil 500 simultaneously engages with both the first magnet 421 and the second magnet 422; the other of the two vibration coils 500 is located in the region between the first magnet 421 and the third magnet 423, and this vibration coil 500 simultaneously engages with both the first magnet 421 and the third magnet 423.

[0041] By employing the above technical solution, the overall relative interaction between the vibration coils 500 and the magnet assembly 420 can be further enhanced by using multiple vibration coils 500 in conjunction with different magnets in the same magnet assembly 420, thereby further improving the vibration sensation.

[0042] As described above, in this embodiment, one of the vibration coil 500 and the magnet assembly 420 is movably connected to the housing 100. For example, the vibration coil 500 can be movably connected to the housing 100. In this case, if there are multiple vibration coils 500, all of them are movably connected to the housing 100. Conversely, if the magnet assembly 420 is movably connected to the housing 100, and if there are multiple magnet assemblies 420, and each magnet assembly 420 includes multiple mutually spaced magnets, each magnet in each magnet assembly 420 must be movably connected to the housing 100.

[0043] This application discloses a vibratory acoustic device, the housing 100 of which is provided with a sound outlet 101. The front cavity sides of the first diaphragm 310 in the first vibration unit 300 and the second diaphragm 410 in the second vibration unit 400 are both connected to the sound outlet 101. The first diaphragm 310 and the second diaphragm 410 are both installed in the housing 100. The first voice coil 320 is connected to the first diaphragm 310. Under the action of the driving magnet 330, the first voice coil 320 can drive the first diaphragm 310 to reciprocate in a first direction to generate sound waves. At the same time, the second voice coil 440 is connected to the second diaphragm 410. Under the action of the magnet assembly 420, the second voice coil 440 can drive the second diaphragm 410 to reciprocate in a first direction to generate sound waves. The sound waves generated by the first diaphragm 310 and the second diaphragm 410 can be transmitted to the outside of the housing 100 through the sound outlet 101.

[0044] Furthermore, in the vibratory acoustic device of this application, in the second direction, the first of the magnet assembly 420 used to drive the second diaphragm 410 to vibrate in the vibrating coil 500 and the second of the magnet assembly 420 is movably connected to the housing 100, and the second of the vibrating coil 500 and the magnet assembly 420 is mounted in the housing. The magnet assembly 420 can also cooperate with the vibrating coil 500, so that in the second direction, the first of the vibrating coil 500 and the magnet assembly 420 can reciprocate along the second direction, which makes the vibratory acoustic device have the vibration capability of a linear motor.

[0045] Furthermore, in the vibratory acoustic device of this application, in the first direction, the projected area of ​​the second diaphragm 410 is larger than that of the first diaphragm 310. This allows the sound emission frequency of the second diaphragm 410 to be lower than that of the first diaphragm 310, thereby giving the vibratory acoustic device a relatively wider range of sound emission frequencies and improving its sound production effect. Simultaneously, in the first direction, at least a portion of the projected area of ​​the first diaphragm 310 lies within the projected area of ​​the second diaphragm 410, so that the first diaphragm 310 and the second diaphragm 410 are at least partially overlapped in the first direction. This results in a more compact arrangement between the first vibration unit 300 and the second vibration unit 400 in the direction perpendicular to the first direction, and allows for a more appropriate reduction in the overall size of the vibratory acoustic device in the direction perpendicular to the first direction, minimizing the space occupied by the vibratory acoustic device in the corresponding direction within the electronic device.

[0046] In the above embodiments, at least a portion of the first diaphragm 310 overlaps with the second diaphragm 410 in the first direction. Based on this, in order to reduce the size of the entire vibrating acoustic device in the first direction, in a specific embodiment of this application, the second voice coil 440 may also overlap with the second diaphragm 410 in the first direction.

[0047] Typically, the voice coil can be directly fixed to one side of the diaphragm by means of bonding or other methods. In this case, the maximum size of the diaphragm and the voice coil in the vibration direction is the sum of the maximum size of the diaphragm and the maximum size of the voice coil, which makes the space occupied by the voice coil and the diaphragm in the vibration direction relatively large.

[0048] Therefore, in the embodiments of this application, such as Figure 7The diagram illustrates the assembly relationship between the second diaphragm 410 and the second voice coil 440 in the vibrating acoustic device disclosed in this application. The second vibration unit 400 may further include a connecting frame 450. In a direction perpendicular to the first direction, at least a portion of the orthographic projection of the second voice coil 440 coincides with the orthographic projection of the second diaphragm 410. This allows the maximum dimension of the second voice coil 440 and the second diaphragm 410 in the first direction to be less than the sum of the dimensions of the second voice coil 440 and the second diaphragm 410 in the first direction, thereby reducing the size of the second vibration unit 400 in the first direction and making the overall vibrating acoustic device relatively smaller in the first direction.

[0049] That is, in this embodiment, the second voice coil 440 is located outside the orthographic projection of the second diaphragm 410 in the first direction, and by designing the positions of the second voice coil 440 and the second diaphragm 410 in the first direction, they can at least partially overlap in the first direction. More intuitively, taking the positions of the front cavity side and the rear cavity side of the second diaphragm 410 as above and below the second diaphragm 410, respectively, in this embodiment, the second voice coil 440 can be located in front of, behind, to the left, or to the right of the second diaphragm 410. Of course, the aforementioned positions can be upright or off-center, such as the second voice coil 440 being located to the left front or right front of the second diaphragm 410, etc., which will not be listed here.

[0050] Of course, to ensure that the second voice coil 440 can still be connected to the second diaphragm 410, in this application, the second voice coil 440 is connected to the second diaphragm 410 through a connecting frame 450. The connecting frame 450 is a rigid structural component, which is connected to both the second voice coil 440 and the second diaphragm 410. Thus, during the reciprocating vibration of the second voice coil 440 along the first direction, the second voice coil 440 can drive the second diaphragm 410 to reciprocate along the first direction via the connecting frame 450. Correspondingly, since the second voice coil 440 is affected by the magnetic field of the magnet assembly 420, in this embodiment, the magnet assembly 420 is used to drive the connecting frame 450 through the second voice coil 440 to drive the second diaphragm 410 to reciprocate in the first direction.

[0051] More specifically, the connecting frame 450 can be a mesh structure or a cross structure. In this case, the connection reliability between the connecting frame 450 and the second voice coil 440 and the second diaphragm 410 can be improved, and the stability when the second voice coil 440 drives the second diaphragm 410 to vibrate can be improved.

[0052] In another embodiment of this application, such as Figure 7As shown, the connecting frame 450 can be a rod-shaped structure. In this case, in the direction perpendicular to the first direction, the connecting frame 450 can be provided on both sides of the second diaphragm 410. At the same time, both sides of the second voice coil 440 are also connected to the two connecting frames 450 respectively, thereby ensuring a high connection stability between the second voice coil 440 and the second diaphragm 410.

[0053] In addition, to enhance the effect of the connecting frame 450 on the second diaphragm 410, the connecting frame 450 can be connected to the second spherical top 411 of the second diaphragm 410. As described above, the second diaphragm 410 includes a second spherical top 411 and a second folded ring portion 412. The second folded ring portion 412 is a ring-shaped structure and is connected to the outer periphery of the second spherical top 411. During the installation of the second diaphragm 410, the outer edge of the second folded ring portion 412 can be connected to the mounting base 220.

[0054] Based on the above structure, in the first direction, the connecting frame 450 can be located on the side of the second spherical top 411 of the second diaphragm 410 facing away from the first diaphragm 310, that is, the connecting frame 450 is connected to the bottom surface of the second diaphragm 410. To further reduce the size of the entire second vibration unit 400 in the first direction, such as... Figure 7 As shown, the connecting bracket 450 can be connected to the side of the second spherical top 411 of the second diaphragm 410. In this case, the driving effect of the second voice coil 440 on the second diaphragm 410 can be relatively good, and the size of the second vibration unit 400 in the first direction can be further reduced.

[0055] As described above, the second voice coil 440 is located on the outer periphery of the second diaphragm 410. In this case, if there is only one second voice coil 440, it may cause a large difference in the vibration uniformity of different regions in the second diaphragm 410. Therefore, in another embodiment of this application, such as Figure 7 As shown, a second voice coil 440 can be provided on both opposite sides of the second diaphragm 410, and the second voice coils 440 are connected to the second diaphragm 410 via a connecting bracket 450. Of course, in this case, corresponding to the two second voice coils 440, the size of the magnet assembly 420 can be appropriately increased to ensure that both second voice coils 440 can cooperate with the same magnet assembly 420. To further improve the vibration stability of each second voice coil 440, in another embodiment of this application, such as... Figure 6 As shown, the second diaphragm 410 can be provided with a second voice coil 440 and a magnetic component on both sides, and the magnetic component on either side of the second diaphragm 410 can be matched with the corresponding second voice coil 440. This can also allow the magnet component 420 and the second diaphragm 410 to have an overlapping part in the first direction, so as to further reduce the size of the second vibration unit 400 in the first direction.

[0056] In the above embodiments, the two second voice coils 440 can be located in front of and behind the second diaphragm 410, respectively, or the two second voice coils 440 can be located to the left and right of the second diaphragm 410, respectively. Furthermore, in the vibrating acoustic device disclosed in this application, the first of the vibrating coil 500 and the magnet assembly 420 can vibrate in a second direction. Based on this, in order to further reduce the overall size of the vibrating acoustic device, the distribution direction of the two second voice coils 440 can be the second direction, thereby allowing the two second voice coils 440 to reuse the vibration space of the vibrating coil 500 or the magnet assembly 420.

[0057] Therefore, in one specific embodiment of this application, such as Figure 6 As shown, and in combination Figure 7 In the second direction, a second voice coil 440 and a magnet assembly 420 are provided on both sides of the second diaphragm 410. Each second voice coil 440 is engaged with the corresponding magnet assembly 420, and each second voice coil 440 is connected to the second diaphragm 410 through a connecting frame 450.

[0058] As described above, the magnet assembly 420 can also interact with the vibration coil 500, thereby enabling the first of the vibration coil 500 and the magnet assembly 420 to reciprocate in the second direction. In the above embodiment, magnet assemblies 420 are provided on both opposite sides of the second diaphragm 410. Therefore, vibration coils 500 can be further provided correspondingly for each magnet assembly 420, so that the two magnet assemblies 420 can cooperate with their respective vibration coils 500, and further improve the vibration effect.

[0059] Furthermore, in the above embodiments, the magnet assembly 420 may include a first magnet 421, a second magnet 422, and a third magnet 423. When magnet assemblies 420 are provided on both opposite sides of the second diaphragm 410, such as... Figure 3 As shown, any magnet assembly 420 may include the first magnet 421, the second magnet 422, and the third magnet 423. In this case, any magnet assembly 420 may be provided with at least two vibration coils 500. Accordingly, one of the two vibration coils 500 corresponds to the interval region between the first magnet 421 and the second magnet 422, and the other of the two vibration coils 500 corresponds to the interval region between the first magnet 421 and the third magnet 423.

[0060] In the above embodiments, the size of the second vibration unit 400 itself in the first direction can be appropriately reduced by designing the assembly method between the second voice coil 440 and the second diaphragm 410 in the second vibration unit 400, thereby reducing the size of the entire vibrating acoustic device in the first direction.

[0061] In another embodiment of this application, the relative positions of the first vibration unit 300 and the second vibration unit 400, as well as the structure of the second diaphragm 410 in the second vibration unit 400, can be designed to reduce the stacking size of the vibrating acoustic devices in the first direction.

[0062] In detail, such as Figure 4 As shown, the orthographic projection of the first diaphragm 310 can be located within the orthographic projection of the second spherical top 411 of the second diaphragm 410, and the second spherical top 411 of the second diaphragm 410 can be arranged to protrude in a direction away from the first diaphragm 310.

[0063] With the above technical solution, while ensuring that the vibration area of ​​the second diaphragm 410 remains unchanged, the clearance space formed by the second spherical top 411 of the second diaphragm 410 protruding away from the first diaphragm 310 can provide a space for the first diaphragm 310, or even the entire first vibration unit 300 (and the aforementioned frame 210). In this case, the size of the front cavity side of the second diaphragm 410 in the first direction can be increased, and by making the second spherical top 411 of the second diaphragm 410 correspond to the first diaphragm 310, the space clearance of the second diaphragm 410 can be used to stack the first diaphragm 310 and other components in the first vibration unit 300.

[0064] Furthermore, in this embodiment, the second spherical top 411 of the second diaphragm 410 is recessed relative to the first diaphragm 310, ensuring that the vibration area and vibration displacement of the second diaphragm 410 remain essentially unchanged. This prevents the volume of air that the second diaphragm 410 can push from being reduced due to the presence of the first vibration unit 300 on one side. Sufficient air volume ensures that the second vibration unit 400 possesses a basic low-frequency response and a strong sense of energy; this is the result of the synergistic effect of the air volume pushed by the second diaphragm 410 and the vibrational force of the second diaphragm 410. As described above, this application increases the air volume pushed by the second diaphragm 410 and the driving force of the second diaphragm 410, thereby resulting in better low-frequency performance of the second vibration unit 400.

[0065] As described above, the vibration coil 500 and the housing 100 can be movably connected in the second direction. To further enhance the vibration effect of the acoustic device, in one specific embodiment of this application, such as... Figure 2 As shown, the vibration coil 500 can be mounted on the housing 100, and correspondingly, the magnet assembly 420 can be movably connected to the housing 100 in the second direction. In this case, the vibration can be further enhanced by using the relatively heavy magnet assembly 420.

[0066] Furthermore, as described above, the vibrating acoustic device may include a mounting base 220, and the second diaphragm 410 and the magnet assembly 420 may both be mounted on the mounting base 220. Meanwhile, since the second voice coil 440 is connected to the second diaphragm 410, the second voice coil 440 is also indirectly mounted on the mounting base 220. In this case, the mounting base 220 may be movably connected to the housing 100 in the second direction, so that the mounting base 220, the second diaphragm 410, the second voice coil 440 and the magnet assembly 420 together constitute an oscillator. When an alternating current is passed through the vibrating coil 500, the aforementioned oscillator can reciprocate relative to the housing 100 in the second direction to further enhance the vibration sensation.

[0067] In this embodiment, the mounting base 220 and the housing 100 can form a sliding fit in the second direction through a structure such as a guide rail. To further improve vibration feedback, in another embodiment of this application, such as... Figure 2 As shown, the vibratory acoustic device also includes an elastic connector 610, and in the second direction, elastic connectors 610 are provided between the opposite sides of the mounting base 220 and the housing 100.

[0068] Obviously, under the action of the elastic connector 610, the mounting base 220, as well as the second diaphragm 410 and magnet assembly 420 mounted on the mounting base 220, can be installed in a suspended state within the housing 100. This can further enhance the vibration sensation when the mounting base 220 drives the magnet assembly 420 and other components to vibrate. The elastic connector 610 can be a tension spring, etc. In other embodiments of this application, the elastic connector 610 can also be a V-type or Y-type spring. Of course, the elastic connector 610 can also be a slotted spring.

[0069] When the mounting base 220 is movably connected to the housing 100, in order to ensure that the rear cavity of the second diaphragm 410 mounted on the mounting base 220 can be in a closed state, the elastic connector 610 can optionally be an elastic structure with a sealing effect. For example, the elastic connector 610 can be formed of a material such as a rubber film, so that in the second direction, both opposite sides of the mounting base 220 can form a sealed connection with the inner wall of the housing 100 through the elastic connector 610. At the same time, through devices such as sealing guides, the other two sides of the mounting base 220 can form a sealed fit with the inner wall of the housing 100, so that the housing 100, the mounting base 220, the elastic connector 610, and the sealing guides as described above form the rear cavity of the second diaphragm 410.

[0070] To reduce the difficulty of sealing the rear cavity of the second diaphragm 410 and to minimize the interference of the aforementioned sealing process on the vibration process of the mounting base 220, in another embodiment of this application, such as Figure 1 , Figure 4 and Figure 6 As shown, the vibrating acoustic device may also include an elastic seal 620, which is disposed around the second diaphragm 410 and is sealed between the housing 100 and the mounting base 220 to enclose and form the rear cavity of the second diaphragm 410.

[0071] Among them, the elastic seal 620 is a closed ring structure, but as Figure 1 As shown, the different parts of the elastic seal 620 in its circumferential direction are located differently in the first direction. More intuitively, in the first direction, the elastic seal 620 has a stepped structure as a whole.

[0072] In detail, taking the elastic seal 620 comprising four sides as an example, the three sides of the elastic seal 620 connected in sequence are in the same or substantially the same position in the first direction. In the first direction, the aforementioned three sides of the elastic seal 620 are all located on the side of the first diaphragm 310 facing away from the second diaphragm 410, and are all connected between the mounting base 220 and the housing 100. At the same time, in the first direction, the remaining side of the four sides of the elastic seal 620 is located on the side of the first diaphragm 310 facing the second diaphragm 410, and the orientation of the aforementioned remaining side of the elastic seal 620 is the orientation of the sound outlet 101 in the housing 100. By making this side of the elastic seal 620 also connected between the housing 100 and the mounting base 220, the elastic seal 620 provides the function of sealing the rear cavity of the second diaphragm 410 without blocking or obstructing the sound outlet 101.

[0073] Furthermore, because the resilient seal 620 possesses elasticity, it can consistently provide a good seal by undergoing elastic deformation when the mounting base 220 reciprocates relative to the housing 100 in the second direction. Specifically, the resilient seal 620 can be formed from materials with elasticity and sealing capabilities, such as foam, and this is not limited to this method.

[0074] When the vibratory acoustic device includes the aforementioned elastic seal 620, the selection of the elastic connector 610 becomes relatively wider. In one specific embodiment of this application, the elastic connector 610 is a spring. Based on this, in order to appropriately increase the contact area between the mounting base 220 and the elastic connector 610 to improve the elastic connection effect of the elastic connector 610, in one specific embodiment of this application, the mounting base 220 can be generally cubic in shape, and the magnet assembly 420 and the like can be installed inside the mounting base 220. Simultaneously, elastic connectors 610 can be provided between the opposite end faces of the mounting base 220 and the housing 100, which results in a larger contact area between the elastic connector 610 and the mounting base 220.

[0075] To minimize the overall size and weight of the mounting base 220, in one specific embodiment of this application, the mounting base 220 may include a mounting plate 221, a first extension plate 222, and a second extension plate 223. Both the first extension plate 222 and the second extension plate 223 are connected to the mounting plate 221, and both extend along a first direction. The mounting plate 221 has mounting holes 2212. During the assembly of the second vibration unit 400, the second diaphragm 410 is disposed at the mounting hole 2212, and the magnet assembly 420 can be fixed to the side of the mounting plate 221 facing or away from the first diaphragm 310 by means of adhesive bonding or other methods. In the second direction, each magnet assembly 420 is sandwiched between the first extension plate 222 and the second extension plate 223. In this case, elastic connectors 610 are provided between the first extension plate 222 and the housing 100, and between the second extension plate 223 and the housing 100. This makes the overall structure of the mounting base 220 relatively simple and ensures that the contact area between the elastic connectors 610 and the mounting base 220 is relatively large.

[0076] As described above, the second diaphragm 410 and the magnet assembly 420 are both mounted on the mounting base 220. In order to maximize the utilization of the space inside the housing 100 and the vibration range of the second diaphragm 410 in the first direction, the mounting base 220 can be relatively centrally located in the housing 100 along the first direction. In this case, the first vibration unit 300 is located on the front cavity side of the second diaphragm 410, and the magnet assembly 420 used to drive the second voice coil 440 is located on the rear cavity side of the second diaphragm 410. Therefore, in this embodiment, in the first direction, the first vibration unit 300 and the magnet assembly 420 are located on opposite sides of the mounting base 220.

[0077] Based on the above, and since the size of the first vibration unit 300 in the direction perpendicular to the first direction is smaller than that of the second vibration unit 400, in order to make fuller use of the space around the first vibration unit 300, in this embodiment of the application, as follows: Figure 3 and Figure 4 As shown, the vibration coil 500 can be located on the side of the mounting base 220 where the first vibration unit 300 is located, and correspondingly, the magnet assembly 420 is located on the side of the mounting base 220 away from the second vibration unit 400.

[0078] To ensure good structural strength, the mounting base 220 can be made of materials such as metal in this application. However, in this case, the mounting base 220 may hinder the effect of the magnetic field of the magnet assembly 420 on the vibrating coil 500. Therefore, further, such as Figure 6 As shown, and in combination Figure 3In this application, the mounting base 220 is provided with a clearance hole 2211, and in the first direction, the vibration coil 500 and the magnet assembly 420 are respectively located on opposite sides of the clearance hole 2211, so that the clearance hole 2211 can provide clearance for the magnetic field of the magnet assembly 420 acting on the vibration coil 500, so as to ensure that the relative interaction effect between the vibration coil 500 and the magnet assembly 420 is good and the interaction relationship is more stable.

[0079] Specifically, the size of the clearance hole 2211 can be set according to the size of the vibration coil 500 to ensure that the part of the vibration coil 500 that mates with the magnet assembly 420 is not sandwiched between the forming material of the mounting base 220 and the corresponding magnet assembly 420. For example, in the first direction, the orthographic projection of the vibration coil 500 can be located within the orthographic projection of the clearance hole 2211, and the orthographic projection of the part of the magnet assembly 420 corresponding to the vibration coil 500 can be located within the orthographic projection of the clearance hole 2211. In addition, in the above embodiment, there can be multiple vibration coils 500, and based on this, there can also be multiple clearance holes 2211, and multiple vibration coils 500 can be provided with clearance holes 2211 one-to-one.

[0080] As described above, the magnet assembly 420 is used to drive the second voice coil 440 to vibrate. Based on this, in order to further enhance the interaction effect between the magnet assembly 420 and the second voice coil 440, in a specific embodiment of this application, the second vibration unit 400 may further include a central magnetic guide plate 431, wherein the central magnetic guide plate 431 is located on the side of the first magnet 421 in the magnet assembly 420 away from the mounting base 220. In this case, the second voice coil 440 may be sleeved on the outer periphery of the central magnetic guide plate 431, so that the strength and stability of the Ampere force experienced by the second voice coil 440 in the magnetic field can be improved.

[0081] Furthermore, in the above embodiments, the magnet assembly 420 may further include a second magnet 422 and a third magnet 423 respectively disposed on opposite sides of the first magnet 421. Based on this, in the vibratory acoustic device disclosed in this application, the second vibration unit 400 may further include a second magnetic sheet 432 and a third magnetic sheet 433, wherein the second magnetic sheet 432 is located on the side of the magnet assembly 420 opposite to the mounting base 220, and the third magnetic sheet 433 is located on the side of the magnet assembly 420 opposite to the mounting base 220. With the above structure, the relative interaction effect between the magnet assembly 420 and the second voice coil 440 can be further improved, thereby further improving the sound production effect of the second diaphragm 410.

[0082] To further improve the control effect on the propagation path of magnetic field lines between magnets in magnet assembly 420, in a specific embodiment of this application, the mounting base 220 can be made of magnetically conductive material. As shown above, in magnet assembly 420, the first magnet 421 is sandwiched between mounting base 220 and central magnetic conductive sheet 431, the second magnet 422 is sandwiched between mounting base 220 and second magnetic conductive sheet 432, and the third magnet 423 is sandwiched between mounting base 220 and third magnetic conductive sheet 433. In this case, the propagation path of magnetic field lines between magnets in magnet assembly 420 can be further optimized to further improve the driving stability of second voice coil 440.

[0083] Based on the vibratory acoustic device disclosed in any of the above embodiments, this application also discloses an electronic device, which includes a device body and any of the above-described vibratory acoustic devices, wherein the vibratory acoustic device is mounted on the device body. Of course, the electronic device may also include other devices such as a battery and a display module, which will not be described in detail here.

[0084] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0085] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A vibratory acoustic device, characterized in that, It includes a housing (100), a first vibration unit (300), a second vibration unit (400), and a vibration coil (500), wherein, The first vibration unit (300) includes a first diaphragm (310), a first voice coil (320), and a driving magnet (330). The second vibration unit (400) includes a second diaphragm (410), a magnet assembly (420), and a second voice coil (440). The first diaphragm (310), the second diaphragm (410), and the driving magnet (330) are all mounted on the housing (100). The housing (100) is provided with a sound outlet (101), and the front cavity sides of the first diaphragm (310) and the second diaphragm (410) are both connected to the sound outlet (101); the first voice coil (320) is connected to the first diaphragm (310), and the driving magnet (330) is used to drive the first voice coil (320) to drive the first diaphragm (310) to reciprocate in the first direction (M); the second voice coil (440) is connected to the second diaphragm (410), and the magnet assembly (420) is used to drive the second voice coil (440) to drive the second diaphragm (410) to reciprocate in the first direction (M); In the first direction (M), the orthographic projection area of ​​the second diaphragm (410) is larger than the orthographic projection area of ​​the first diaphragm (310), and at least a portion of the orthographic projection of the first diaphragm (310) is located within the orthographic projection of the second diaphragm (410). In the second direction (N), the first of the magnet assembly (420) and the vibration coil (500) is movably connected to the housing (100), and the second of the magnet assembly (420) and the vibration coil (500) is mounted on the housing (100). The magnet assembly (420) is also used to cooperate with the vibration coil (500) to make the first one reciprocate along the second direction (N), which intersects the first direction (M).

2. The vibratory acoustic device according to claim 1, characterized in that, The second vibration unit (400) further includes a connecting frame (450). In a direction perpendicular to the first direction, at least a portion of the orthographic projection of the second voice coil (440) coincides with the orthographic projection of the second diaphragm (410), and the second voice coil (440) is connected to the second diaphragm (410) through the connecting frame (450). The magnet assembly (420) is used to drive the connecting frame (450) through the second voice coil (440) to drive the second diaphragm (410) to reciprocate in the first direction (M).

3. The vibratory acoustic device according to claim 2, characterized in that, In the second direction (N), the second voice coil (440) and the magnet assembly (420) are provided on opposite sides of the second diaphragm (410). Each second voice coil (440) cooperates with the corresponding magnet assembly (420), and each second voice coil (440) is connected to the second diaphragm (410) through the connecting frame (450).

4. The vibratory acoustic device according to claim 1, characterized in that, The orthographic projection of the first diaphragm (310) is located within the orthographic projection of the second sphere top (411) of the second diaphragm (410), and the second sphere top (411) of the second diaphragm (410) is convex in a direction away from the first diaphragm (310).

5. The vibratory acoustic device according to claim 1, characterized in that, The vibration coil (500) is mounted on the housing (100), and the vibration acoustic device includes a mounting base (220) and an elastic connector (610). The second diaphragm (410) and the magnet assembly (420) are both mounted on the mounting base (220). In the second direction, the elastic connector (610) is provided between the opposite sides of the mounting base (220) and the housing (100).

6. The vibratory acoustic device according to claim 5, characterized in that, The vibrating acoustic device further includes an elastic seal (620) which is disposed around the second diaphragm (410) and is sealed between the housing (100) and the mounting base (220) to enclose and form the rear cavity of the second diaphragm (410).

7. The vibratory acoustic device according to claim 1, characterized in that, The vibrating acoustic device includes a mounting base (220), on which the second diaphragm (410) and the magnet assembly (420) are both mounted. The mounting base (220) is provided with a clearance hole (2211). In the first direction (M), the vibrating coil (500) and the magnet assembly (420) are located on opposite sides of the clearance hole (2211).

8. The vibratory acoustic device according to claim 1, characterized in that, The magnet assembly (420) includes a first magnet (421) and a second magnet (422), which are spaced apart in the second direction (N). In the first direction (M), a portion of the vibrating coil (500) is opposite to the first magnet (421), and another portion of the vibrating coil (500) is opposite to the second magnet (422). The first magnet (421) and the second magnet (422) have opposite polarities toward the magnetic poles of the vibrating coil (500).

9. The vibratory acoustic device according to claim 1, characterized in that, The vibrating acoustic device includes a frame (210), which includes a frame (211) and a magnetic back plate (212). The frame (211) is connected to the housing (100), and the magnetic back plate (212) is connected to the frame (211). The first diaphragm (310) is mounted on the frame (211), and the driving magnet (330) of the first vibration unit (300) is mounted on the side of the magnetic back plate (212) facing the first diaphragm (310).

10. An electronic device, characterized in that, It includes a device body and a vibratory acoustic device as described in any one of claims 1-9, wherein the vibratory acoustic device is mounted on the device body.

Images