Acoustic device and electronic apparatus

Abstract

The invention discloses an acoustic device and electronic equipment, and belongs to the technical field of electronic equipment, and the acoustic device comprises a seat body, a vibrating diaphragm, a vibrating part, an elastic assembly, a first coil, a second coil and a driving magnet, the vibrating diaphragm is installed on the first end face of the base body, the first coil is connected with the vibrating diaphragm, and the first coil is matched with the driving magnet so as to drive the vibrating diaphragm to vibrate in the thickness direction of the vibrating diaphragm; the vibration piece is arranged on the side, away from the vibrating diaphragm, of the driving magnet, the vibration piece is movably connected with the base body through the elastic assembly, the second coil is connected with the vibration piece, and the second coil is matched with the driving magnet so as to drive the vibration piece to vibrate in the thickness direction.

Description

Technical Field

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

[0002] As large display areas become increasingly popular with users, the number of components on the front of electronic devices, such as mobile phones, is decreasing in the design process, so that the front of the electronic device can provide a more comprehensive and holistic display effect.

[0003] Meanwhile, to ensure good privacy during calls, related technologies typically utilize an exciter installed on the back of the display screen to transmit sound. This exciter uses bone conduction to transmit vibrations through the display screen and the user's facial bones to the user's auditory nerve, ensuring that the content of the call is almost never leaked.

[0004] However, in scenarios such as watching movies using electronic devices, traditional air-conduction speakers are also incorporated into the technology to ensure relatively good sound quality. This results in a large number of components in the electronic device, which is not conducive to cost control and also negatively impacts the installation space within the device. Summary of the Invention

[0005] The purpose of this application is to provide an acoustic device and an electronic device to solve the problem that equipping both an exciter and a speaker in current electronic devices is not conducive to cost control and will have an adverse impact on the installation space within the electronic device.

[0006] In a first aspect, embodiments of this application disclose an acoustic device, which includes a base, a diaphragm, a vibrating element, an elastic component, a first coil, a second coil, and a driving magnet, wherein; The diaphragm is mounted on the first end face of the base, and the first coil is connected to the diaphragm. The first coil cooperates with the driving magnet to drive the diaphragm to vibrate in its own thickness direction. The vibrating element is disposed on the side of the driving magnet away from the diaphragm, and the vibrating element is movably connected to the base through the elastic component. The second coil is connected to the vibrating element, and the second coil cooperates with the driving magnet to drive the vibrating element to vibrate in the thickness direction.

[0007] Secondly, embodiments of this application disclose an electronic device, which includes a display screen, a cover, a frame, and the aforementioned acoustic devices, wherein... The display screen is installed on one side of the frame, the cover is installed on the other side of the frame, the acoustic device is disposed between the display screen and the cover, and the second end face of the base of the acoustic device is fixedly connected to the display screen.

[0008] This application discloses an acoustic device in which a diaphragm is mounted on the first end face of a base, and a first coil is connected to the diaphragm. By cooperating with a driving magnet, the first coil can drive the diaphragm to vibrate in its own thickness direction. The aforementioned vibration can be transmitted to the outside of the electronic device through a propagation medium such as air. At the same time, a vibrating element is disposed on the side of the driving magnet away from the diaphragm, and the vibrating element is movably connected to the base through an elastic component. By connecting the vibrating element to a second coil, the second coil, in cooperation with the driving magnet, can achieve the purpose of driving the vibrating element to vibrate in the thickness direction of the diaphragm. Furthermore, by fixing the second end face of the acoustic device away from the diaphragm to the display screen of the electronic device, the display screen can be used as a propagation medium, so that the vibration emitted by the vibrating element can also be transmitted to the user's facial bones and other areas, ensuring that the user can normally receive the sound emitted by the vibrating element.

[0009] Obviously, in the acoustic device disclosed in this application, since the driving magnet provides a magnetic field for both the first coil and the second coil, the first coil and the second coil can share the structure of the driving magnet. This reduces the number of devices configured in the acoustic device and the entire electronic device. On the one hand, it reduces the cost and assembly difficulty of the entire acoustic device. On the other hand, compared with the scheme of setting exciter and speaker separately in related technologies, the embodiments of this application utilize the ability to have both exciter and speaker, thereby reducing the total space occupied by the acoustic device in the electronic device.

[0010] Of course, in the acoustic device disclosed in this application, its excitation function (i.e., the vibration process of the vibrating element) and sound-emitting function (i.e., the vibration process of the diaphragm) are independent of each other, so as to ensure that the acoustic device of this application has the same function as the technical solution in the related technology that simultaneously equips acoustic devices and loudspeakers. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application 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 acoustic device disclosed in the embodiments of this application; Figure 2 This is an exploded view of the electronic device disclosed in the embodiments of this application; Figure 3 This is a cross-sectional schematic diagram of the electronic device disclosed in the embodiments of this application.

[0012] Figure label: 100-Display screen, 200-lid, 300-Frame 400-Acoustic component, 401-Waterproof and breathable membrane, 402-Foam, 411-Base, 412-Fixing plate, 420-Diaphragm, 421-Dome, 422-Boom, 430-Vibrating component, 431-Mass block, 4311-Through hole, 433-Connecting protrusion, 440-Elastic component, 441-First elastic component, 442-Second elastic component, 451-First coil, 452-Second coil, 460-Drive magnet, 461-First magnet, 462-Second magnet, 471-First magnetic conductor, 472-Second magnetic conductor, 480-Mounting bracket, 481-Frame, 482-Connector, 4821-Avoidance bending section, 491-First flexible plate, 492-Second flexible plate 510 - Circuit board, 511 - First through hole, 520 - Bracket, 521 - Second through hole 600-sealing plate, 700-Camera Module. Detailed Implementation

[0013] 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.

[0014] 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.

[0015] like Figures 1-3As shown in the figure, this application discloses an acoustic device and an electronic device. The acoustic device can be applied in the electronic device. The electronic device also includes a display screen 100, a cover 200, a frame 300, and the acoustic device 400 disclosed in this application. Of course, the electronic device may also include other devices and mechanisms such as a battery and a camera module 700, which will not be listed here.

[0016] In the electronic device disclosed in the embodiments of this application, the display screen 100 is used to provide a display function, and the cover 200 and the frame 300 are both external structures of the electronic device. Of course, the aforementioned can also serve as the direct or indirect mounting base for other devices. For example, the battery can be mounted on the frame 300, and the camera module 700 can be connected to the cover 200 so that the camera module 700 can obtain the light propagating to the back of the electronic device to achieve the purpose of shooting.

[0017] During the assembly of electronic devices, such as Figure 2 and Figure 3 As shown, the display screen 100 is mounted on one side of the frame 300, and the cover 200 is mounted on the other side of the frame 300, so that electronic devices can form a receiving space, allowing acoustic devices 400 and batteries to be installed in the aforementioned receiving space. The cover 200 and frame 300 also provide protection for the acoustic devices 400 and batteries. Specifically, the cover 200 and frame 300 can be formed of rigid materials such as plastic or metal, and their specific shapes and dimensions can be flexibly determined according to actual needs; this document does not impose any limitations on this.

[0018] In the acoustic device 400 disclosed in this application embodiment, the acoustic device 400 has the ability to generate sound by vibrating the diaphragm 420 to use air as a transmission medium. At the same time, the acoustic device 400 also has the ability to transmit sound by vibrating the vibrating element 430 to use a solid medium such as the display screen 100.

[0019] Based on the above, during the assembly of electronic devices, an acoustic device 400 is disposed between the display screen 100 and the cover 200, and there is a connection between the acoustic device 400 and the display screen 100. More specifically, the first end face of the base 411 in the acoustic device 400 is provided with a diaphragm 420 to generate sound when the diaphragm 420 vibrates, and the second end face of the base 411 in the acoustic device 400 is fixedly connected to the display screen 100 so that when the vibrating element 430 in the acoustic device 400 vibrates, the vibration is transmitted through the display screen 100 to the user's ear canal to achieve the purpose of generating sound.

[0020] The specific structure of the acoustic device 400 disclosed in the embodiments of this application will be described below.

[0021] like Figure 1As shown in the embodiments of this application, the acoustic device 400 includes a base 411, a diaphragm 420, a vibrating element 430, an elastic component 440, a first coil 451, a second coil 452, and a driving magnet 460.

[0022] The base 411 is the external structure of the acoustic device 400, and other components in the acoustic device 400 can be interconnected with the base 411 to serve as the mounting base for these components. Specifically, the diaphragm 420, vibrating element 430, elastic component 440, first coil 451, second coil 452, and driving magnet 460 in the acoustic device 400 can all be directly or indirectly mounted on the base 411. The base 411 can be formed of rigid materials such as plastic or metal; the actual shape and size of the base 411 are not limited herein. Typically, the acoustic device 400 is generally cubic in shape; therefore, in this embodiment, the base 411 is generally a rectangular closed loop structure.

[0023] More specifically, in the electronic device disclosed in this application embodiment, the diaphragm 420 is mounted on the first end face of the base 411. Optionally, the diaphragm 420 can be mounted on the first end face of the base 411 by means of bonding or other methods, so that sound is generated when the diaphragm 420 vibrates along its own thickness direction. More specifically, the diaphragm 420 may include a dome 421 and a folded ring 422, wherein one side surface of the folded ring 422 is fixedly connected to the first end face of the base 411, and the dome 421 is fixedly connected to the central region of the folded ring 422. At the same time, by designing a reasonable sound transmission channel in the electronic device, it can be ensured that the sound generated by the diaphragm 420 can use air as a propagation medium and propagate from the inside of the electronic device to the outside of the electronic device, and be heard by the user.

[0024] Of course, in this application, in order to ensure that the diaphragm 420 can vibrate normally and in a controlled manner, the first coil 451 needs to be connected to the diaphragm 420. More specifically, the first coil 451 is connected to the dome 421 so that when the first coil 451 is energized, the interaction between the first coil 451 and the driving magnet 460 can be used to drive the diaphragm 420 to vibrate. That is, in the embodiment of this application, the first coil 451 is connected to the diaphragm 420, and the first coil 451 cooperates with the driving magnet 460 to drive the diaphragm 420 to vibrate in its own thickness direction.

[0025] Meanwhile, to ensure that the vibrating element 430 can generate vibration, it needs to be connected to the second coil 452. Then, when the second coil 452 is energized, the interaction between the second coil 452 and the driving magnet 460 is utilized to drive the vibrating element 430 to reciprocate in the thickness direction of the diaphragm 420. Of course, to ensure that the vibration of the vibrating element 430 is relatively stable and reliable, in this embodiment, the elastic component 440 can also be used to provide appropriate constraint on the movement of the vibrating element 430.

[0026] Therefore, in this embodiment, the vibrating element 430 is movably connected to the base 411 via an elastic component 440. The elastic component 440 may include a device with good elasticity, such as a coil spring. Of course, in other embodiments of this application, the structure of the device included in the elastic component 440 may differ from that of a coil spring, and this is not limited herein. Furthermore, in order to prevent the vibration processes of the vibrating element 430 and the diaphragm 420 from interfering with each other, in this embodiment, such as... Figure 3 As shown, the vibrating element 430 can be positioned on the side of the driving magnet 460 away from the diaphragm 420.

[0027] Accordingly, when the acoustic device disclosed in this application is applied to an electronic device, by fixing the second end face of the base 411 to the display screen 100, when the vibrating element 430 vibrates along the thickness direction of the diaphragm 420, the display screen 100 can be used as a transmission medium between the vibrating element 430 and the user, so that the vibration effect can be transmitted to the user's facial bones, and the user can finally hear the sound emitted by the vibrating element 430.

[0028] Accordingly, by means of bonding, the second coil 452 can be connected to the vibrating element 430, and by making the second coil 452 cooperate with the driving magnet 460, the second coil 452 can drive the vibrating element 430 to vibrate in the thickness direction of the diaphragm 420, thereby generating corresponding sound.

[0029] Of course, both the first coil 451 and the second coil 452 need to be connected to power supply devices such as batteries in acoustic devices or electronic devices to ensure that the first coil 451 and the second coil 452 can work normally. The first coil 451 and the second coil 452 can be connected to the battery or the like through wires. Alternatively, in another embodiment of this application, the acoustic device may also include a first flexible plate 491 and a second flexible plate 492, wherein the first coil 451 is connected to the battery or the like through the first flexible plate 491, and the second coil 452 is connected to the battery or the like through the second flexible plate 492.

[0030] Of course, acoustic devices or electronic devices usually also include control devices. Therefore, both the first coil 451 and the second coil 452 are connected to the control device. The control device can control the on / off state of the first coil 451 and the second coil 452 with the power supply device such as a battery, so that the control device can, based on corresponding control commands, correspondingly control at least one of the first coil 451 and the second coil 452 to be energized, and produce a corresponding effect with the driving magnet 460. That is, in the acoustic device disclosed in the embodiments of this application, the first coil 451 and the second coil 452 are independent of each other. Correspondingly, the vibration process of the diaphragm 420 and the vibration process of the vibrating element 430 are also independent of each other; they can work simultaneously or separately.

[0031] In one specific embodiment of this application, the driving magnet 460 can be an electromagnet; in another embodiment, the driving magnet 460 can be a permanent magnet, thereby reducing the cost of the acoustic device 400 and the entire electronic device, and also reducing the control difficulty of the acoustic device 400. The first coil 451 and the second coil 452 share the driving magnet 460, thereby reducing the number of devices required for the acoustic device 400 in the electronic device. This reduces costs and assembly difficulty, and also minimizes the installation space occupied by the entire acoustic device 400 in the electronic device.

[0032] In the above scheme, the vibration direction of the diaphragm 420 is the same as the vibration direction of the vibrating element 430. In this case, the first coil 451 and the second coil 452 can be respectively arranged on opposite sides of the driving magnet 460 so that the first coil 451 and the second coil 452 can move relative to the driving magnet 460 along the vibration direction of the diaphragm under the action of the magnetic field. Of course, the movement direction of the first coil 451 and the second coil 452 is related to the direction of the current passed through them. When the direction of the current passed through them changes back and forth, the first coil 451 and the second coil 452 can respectively drive the diaphragm 420 and the vibrating element 430 to vibrate along the thickness direction of the diaphragm 420.

[0033] In addition, in the above embodiments, the driving magnet 460 can be directly fixedly connected to the inner sidewall of the base 411. Meanwhile, in order to ensure a stable assembly relationship between the entire acoustic device 400 and devices such as the display screen 100, in the above embodiments, the base 411 can be connected to devices such as the frame 300 or the cover 200. Of course, there are various specific installation methods for the base 411, such as adhesive bonding, snap-fitting, or connection with the connector 482, etc., which are not limited herein.

[0034] This application discloses an acoustic device 400. A diaphragm 420 is mounted on the first end face of a base 411, and a first coil 451 is connected to the diaphragm 420. By cooperating with a driving magnet 460, the first coil 451 can drive the diaphragm 420 to vibrate in its own thickness direction. The aforementioned vibration can be transmitted to the outside of the electronic device through a transmission medium such as air. At the same time, a vibrating element 430 is disposed on the side of the driving magnet 460 away from the diaphragm 420, and the vibrating element 430 is movably connected to the base 411 through an elastic component 440. By causing the vibration... The component 430 is connected to the second coil 452, so that when the second coil 452 cooperates with the driving magnet 460, it can drive the vibrating component 430 to vibrate in the thickness direction of the diaphragm 420. Furthermore, by fixing the second end face of the acoustic device 400 away from the diaphragm 420 to the display screen 100 of the electronic device, the display screen 100 can be used as a transmission medium, so that the vibration emitted by the vibrating component 430 can also be transmitted to the user's facial bones and other areas, ensuring that the user can normally obtain the sound emitted by the vibrating component 430.

[0035] Obviously, in the acoustic device disclosed in this application, since the driving magnet 460 provides a magnetic field for both the first coil 451 and the second coil 452, the first coil 451 and the second coil 452 can share the structure of the driving magnet 460. This reduces the number of devices configured in the acoustic device 400 and the entire electronic device. On the one hand, it reduces the cost and assembly difficulty of the entire acoustic device. On the other hand, compared with the scheme of setting exciter and speaker separately in related technologies, the embodiment of this application utilizes the ability to have both exciter and speaker, thereby reducing the total space occupied by the acoustic device 400 in the electronic device.

[0036] Of course, in the acoustic device 400 disclosed in this application, its excitation function (i.e., the vibration process of the vibrating element 430) and sound-raising function (i.e., the vibration process of the diaphragm 420) are independent of each other, so as to ensure that the acoustic device 400 of this application has the same function as the technical solution in the related art that simultaneously equips the acoustic device 400 and the loudspeaker.

[0037] As described above, the elastic component 440 may include a helical spring. Based on this, in a specific embodiment of this application, the number of helical springs can be multiple, and the multiple helical springs are arranged around the vibrating member 430. At the same time, by connecting one end of each helical spring to the vibrating member 430 and connecting the other end of each helical spring to the inner sidewall of the seat 411, the vibrating member 430 can form a good movable connection with the seat 411 in the thickness direction of the diaphragm 420, and ensure that the vibration stability of the vibrating member 430 is relatively high.

[0038] In one embodiment, the elastic component may also be a spring sheet, which is not specifically limited in this application.

[0039] To further improve the vibration effect of the vibrating element 430, optionally, such as Figure 1 As shown, the acoustic device may include a fixing plate 412, which is fixed to the second end face of the base 411. When the acoustic device is applied in an electronic device, the side of the fixing plate 412 facing away from the diaphragm 420 can be attached to and fixed to the display screen 100. This allows the base 411 and the fixing plate 412 to work together on the overall outer frame 300 of the acoustic device 400, thereby improving the installation and operation stability of each component in the acoustic device 400. At the same time, it can also improve the vibration effect of the vibrating component 430 to a certain extent.

[0040] In one specific embodiment of this application, the driving magnet 460 can be fixedly connected to the inner sidewall of the base 211 by means of bonding or other methods. In order to reduce the assembly difficulty between the driving magnet 460 and the base 211, in another embodiment of this application, the acoustic device can also include a mounting bracket 480. The mounting bracket 480 can specifically be a plate-shaped structural member. By making the outer edge of the mounting bracket 480 extend beyond the first coil and the second coil, the edge of the mounting bracket 480 can be directly connected to the inner sidewall of the base 411, thereby making the mounting bracket 480 fixedly connected to the base 411.

[0041] Meanwhile, in the thickness direction of the diaphragm 420, the mounting bracket 480 is located between the diaphragm 420 and the fixing plate 412. In this case, by means of bonding, the driving magnet 460 can be connected to the side of the mounting bracket 480 facing the diaphragm 420, so as to ensure that the driving magnet 460 can form a relatively stable assembly relationship with the base 411.

[0042] Of course, in order to ensure that the vibrating element 430 can still provide vibration normally, in this embodiment of the application, the vibrating element 430 is located between the fixed plate 412 and the mounting bracket 480 in the thickness direction of the diaphragm 420, and the second coil 452 is connected to the vibrating element 430. Thus, when the second coil 452 is working, it can be ensured that the vibrating element 430 can still generate reciprocating vibration relative to the fixed plate 412 and the base 411 in the thickness direction of the diaphragm 420.

[0043] To further improve the reliability of the elastic component 440, such as Figure 1 As shown, the elastic component 440 may include a first elastic element 441 and a second elastic element 442, wherein the first elastic element 441 is elastically disposed between the mounting bracket 480 and the vibrating element 430, and the second elastic element 442 is disposed between the vibrating element 430 and the fixing plate 412.

[0044] With the above technical solution adopted, since the vibrating element 430 has a space for movement on both sides, and the vibrating element 430 is provided with a first elastic element 441 and a second elastic element 442 on both sides, and is connected to the display screen 100 by means of fixing plate 412, the reciprocating vibration space of the vibrating element 430 is relatively large, thereby improving the vibration effect of the vibrating element 430 and thus improving the sound effect of the sound generated by the vibrating element 430.

[0045] In this embodiment, both the first elastic element 441 and the second elastic element 442 may include compression springs. Of course, they may also adopt other structural forms such as bent spring sheets, which are not limited herein. In addition, in this embodiment, the number of each of the first elastic element 441 and the second elastic element 442 may be one or more. Any first elastic element 441 and any second elastic element 442 may be simply sandwiched between the corresponding devices without the elastic ends of the first elastic element 441 and the second elastic element 442 forming a connection relationship with the corresponding devices. In another embodiment of this application, the elastic ends of the first elastic element 441 may be fixedly connected to the mounting frame 480 and the vibrating element 430 respectively by welding and bonding, and the elastic ends of the second elastic element 442 may be fixedly connected to the vibrating element 430 and the fixing plate 412 respectively.

[0046] More specifically, in one specific embodiment of this application, the number of second elastic elements 442 can be multiple, and the multiple second elastic elements 442 are spaced apart in the direction surrounding the thickness direction of the diaphragm 420. Simultaneously, the opposite ends of each second elastic element 442 are respectively connected to the vibrating element 430 and the fixing plate 412. The number of second elastic elements 442 can be two or three. Considering that the overall shape of the acoustic device 400 and the shape of its base 411 are generally rectangular cubic structures, in one specific embodiment of this application, the number of second elastic elements 442 can be four, and the four second elastic elements 442 are distributed at the four corners of the base 411. The elastic ends of any second elastic element 442 can be fixedly connected to the vibrating element 430 and the fixing plate 412 by welding or bonding, respectively.

[0047] With the above technical solution, on the one hand, it can prevent the vibrating element 430 from deviating in the thickness direction relative to the diaphragm 420, thereby making the vibration process of the vibrating element 430 relative to the fixed plate 412 more stable. On the other hand, multiple second elastic elements 442 can be used to restrict the vibrating element 430 from rotating relative to the fixed plate 412 in the direction around the thickness direction, which can further improve the stability of the vibration effect of the vibrating element 430.

[0048] In the above embodiments of this application, if there are multiple second elastic elements 442, there can also be multiple first elastic elements 441, which can further improve the stability of the vibration trajectory of the vibrating element 430. In order to minimize the obstruction effect of the first elastic elements 441 and the second elastic elements 442 on the vibration process of the vibrating element 430, in a specific embodiment of this application, there are multiple second elastic elements 442 and one first elastic element 441.

[0049] Of course, to maximize the vibration stability of the vibrating element 430, the first elastic element 441 can be centrally located relative to the vibrating element 430, or in other words, the elastic action position of the first elastic element 441 can be positioned relative to the center of the vibrating element 430. For example, in a specific embodiment of this application, the first elastic element 441 can be a bending spring, which includes a first connecting part, a second connecting part, and a bending elastic part. Both the first and second connecting parts can be flat plate structures, one of which is connected to the mounting bracket 480, and the other is fixedly connected to the vibrating element 430. The bending elastic part can generally be a "V"-shaped structure. The first and second connecting parts are respectively connected to opposite ends of the bending elastic part. Under the action of the bending elastic part, the first elastic element 441 possesses elasticity, and the elastic direction is the vibration direction of the diaphragm. When the first elastic element 441 adopts the above structure, the first and second connecting parts can be centrally located relative to the mass block 431. Similarly, the structure and connection method of the second elastic element 442 can be set with reference to the first elastic element 441, and will not be repeated here.

[0050] As described above, the first coil 451 and the second coil 452 can drive the diaphragm 420 and the vibrating element 430 to vibrate respectively under the action of Ampere force. In order to further improve the stability and consistency of the first coil 451 and the second coil 452 in the reciprocating driving process, so as to improve the vibration effect of the diaphragm 420 and the vibrating element 430, and thus improve the sound effect of the acoustic device 400, such as... Figure 1 As shown, in a specific embodiment of this application, the driving magnet 460 includes a first magnet 461 and a second magnet 462, and in the thickness direction of the diaphragm 420, the first magnet 461 and the second magnet 462 are both sandwiched between the diaphragm 420 and the vibrating member 430.

[0051] The first coil is located on the side of the second coil closer to the diaphragm 420, so that the first coil is connected to the diaphragm 420 and the second coil is connected to the vibrating element 430. At the same time, at least a portion of each of the first coil and the second coil is sleeved outside the first magnet 461, and the second magnet 462 is disposed on the outer periphery of at least a portion of each of the first coil and the second coil.

[0052] Furthermore, in the first magnet 461 and the second magnet 462, one of the magnetic poles near the diaphragm 420 is an N pole and the other is an S pole. This results in at least a portion of the magnetic field lines formed between the magnetic poles of the first magnet 461 and the second magnet 462 near the diaphragm 420 being perpendicular to the thickness direction of the diaphragm. This makes the stability of the driving magnet 460 when driving the first coil by Ampere force relatively better. Correspondingly, since one of the magnetic poles of the first magnet 461 and the second magnet 462 near the vibrating element 430 is an S pole and the other is an N pole, the stability of the driving magnet 460 when driving the second coil by Ampere force is relatively better.

[0053] To further improve the motion consistency of the first and second coils, in this embodiment, as described above, the driving magnet 460 includes a plurality of second magnets 462, which are spaced apart on the outer periphery of the first and second coils along the thickness direction. Correspondingly, the magnetic pole of the first magnet 461 near the diaphragm 420 can be an N pole, and the magnetic poles of the plurality of second magnets 462 near the diaphragm 420 are all S poles; alternatively, the magnetic pole of the first magnet 461 near the diaphragm 420 can be an S pole, and the magnetic poles of the plurality of second magnets 462 near the diaphragm 420 are all N poles. With the above technical solution, the magnetic field lines formed between each second magnet 462 and the magnetic pole of the first magnet 461 near the diaphragm 420 all have the ability to drive the first coil to move in the same direction (e.g., along the thickness direction of the diaphragm 420), thereby achieving the goal of improving the motion consistency of the first coil. Correspondingly, the magnetic field lines formed between each second magnet 462 and the magnetic pole of the first magnet 461 near the vibrating member 430 are capable of driving the second coil to move in the same direction, so as to improve the motion consistency of each part of the second coil.

[0054] With the above technical solution, the magnetic field direction in the region near the magnetic pole end of the diaphragm 420 (or vibrating element 430) in the overall structure of the driving magnet 460 is generally from the outside to the inside (or from the inside to the outside). Therefore, when the first coil and the second coil sandwiched between the first magnet 461 and the second magnet 462 are energized, it can be ensured that any position of the first coil and the second coil can stably move relative to the base 411 along the aforementioned thickness direction. Correspondingly, by alternately changing the direction of the current flowing into the first coil, the first coil can be made to reciprocate along the aforementioned thickness direction, thereby causing the diaphragm 420 to vibrate. Similarly, by alternately changing the direction of the current in the second coil, the second coil can also drive the vibrating element 430 to vibrate.

[0055] More specifically, both the first magnet 461 and the second magnet 462 can be permanent magnets to reduce costs and significantly reduce the control difficulty of the electronic device. Furthermore, the number of second magnets 462 can be flexibly selected according to actual conditions. Generally, the higher the arrangement density of the second magnets 462 around the outer periphery of the first coil (and the second coil), the better. However, considering factors such as assembly difficulty and cost, and to prevent the magnetic fields of different second magnets 462 from potentially overlapping and adversely affecting the magnetic field distribution of the entire driving magnet 460, in one specific embodiment of this application, the number of second magnets 462 can be four. Given that the base 411 is generally cubic in shape, with the thickness direction as the vertical direction, one second magnet 462 can be placed in front of, behind, to the left of, and to the right of the first magnet 461.

[0056] To further improve the distribution stability of the magnetic field formed by the first magnet 461 and the plurality of second magnets 462, and thus enhance the driving effect of the first coil and the second coil, in the embodiments of this application, such as Figure 1 As shown, the electronic device also includes a first magnetic conductive element 471 and a second magnetic conductive element 472. The first magnetic conductor 471 is provided on at least one side of the first magnet 461 facing and away from the diaphragm 420, and the first magnetic conductive element 471 is arranged opposite to the first magnet 461 in the thickness direction. The second magnetic conductor 472 is provided on at least one side of the second magnet 462 facing and away from the diaphragm 420, and the second magnetic conductive element 472 is arranged opposite to the second magnet 462 in the thickness direction. The first magnetic conductive element 471 and the second magnetic conductive element 472 can be used to constrain the magnetic field so that the resulting magnetic field distribution better meets the requirements.

[0057] Specifically, both the first magnetic conductive element 471 and the second magnetic conductive element 472 are formed of magnetic conductive material, and in order to reduce the overall size of the acoustic device 400, in this embodiment of the application, both the first magnetic conductive element 471 and the second magnetic conductive element 472 can be sheet-like structural components.

[0058] Optionally, the number of second magnetic conductive elements 472 provided on any side of the second magnet 462 can be multiple, and the multiple second magnetic conductive elements 472 correspond one-to-one with the multiple second magnets 462. In order to further improve the force-bearing effect of the first coil and the second coil at any position in the direction around the thickness direction, in another embodiment of this application, the second magnetic conductive element 472 can be a closed ring structure. In this case, one magnetic pole of each of the multiple second magnets 462 can correspond to the second magnetic conductive element 472, and the above-mentioned second magnetic conductive elements 472 can be provided on both sides of the second magnet 462 facing and away from the diaphragm 420.

[0059] Alternatively, the first magnetic guide element 471 and the second magnetic guide element 472 can be provided only on the side of the first magnet 461 and the second magnet 462 facing the diaphragm 420. In order to improve the vibration effect of both the diaphragm 420 and the vibrating element 430 and enhance the overall performance of the acoustic device 400, in another embodiment of this application, the first magnetic guide element 471 and the second magnetic guide element 472 are provided on both the side of the first magnet 461 and the second magnet 462 facing the diaphragm 420 and the side of the first magnet 461 and the second magnet 462 facing the vibrating element 430. Of course, due to the influence of different corresponding structures, the specific structure and size parameters of the first magnetic guide element 471 and the second magnetic guide element 472 on opposite sides of the first magnet 461 can be different.

[0060] In the above embodiments of this application, since both the first coil and the second coil are sleeved outside the first magnet 461, therefore, in the embodiments of this application, as follows: Figure 1 As shown, the electronic device includes the aforementioned mounting bracket 480. A first magnet 461 is fixed to the side of the mounting bracket 480 facing the diaphragm 420. Furthermore, to minimize the size of the acoustic device 400 in the thickness direction, facilitating the thinner and lighter development of the electronic device, in one specific embodiment of this application, the mounting bracket 480 may include a frame 481 and a connector 482. Specifically, in the thickness direction of the diaphragm 420, the frame 481 is located between the first magnet 461 and the vibrating element 430, and the first magnet 461 is connected to the frame 481; as... Figure 1 and Figure 3 As shown, the connector 482 is connected to the outer periphery of the frame 481 and is connected to the base 411. The second magnet 462 is installed on the side of the connector 482 facing the diaphragm 420. Meanwhile, in this embodiment, the connector 482 is provided with a bend avoidance portion 4821. In the thickness direction, the bend avoidance portion 4821 protrudes from the frame 481 in a direction away from the diaphragm 420, so that at least a portion of the second coil is accommodated within the bend avoidance portion 4821 in the thickness direction of the diaphragm 420.

[0061] Obviously, by adopting the above technical solution, the dimensions of the first magnet 461 and the second magnet 462 in the aforementioned thickness direction can be appropriately reduced, and the avoidance bend 4821 can provide clearance space for the movement of the second magnet 462, thereby ensuring that the second magnet 462 can reciprocate normally relative to the base 411 in the aforementioned thickness direction. Specifically, the connector 482 can be a ring-shaped structure, and correspondingly, the avoidance bend 4821 is also a ring-shaped structure as a whole.

[0062] To reduce the machining difficulty of connector 482 and the entire mounting bracket 480, in another embodiment of this application, such as Figure 3As shown, the mounting bracket 480 can have multiple connectors 482, and these connectors 482 can be spaced apart in the direction surrounding the thickness direction. Each connector 482 is provided with the avoidance bending portion 4821. In this case, the mounting bracket 480 can be formed from a plate-shaped substrate by stamping and sheet metal processing, which can reduce the processing difficulty of the connectors 482, especially the avoidance bending portion 4821, and can also reduce the weight and material cost of the entire mounting bracket 480 to a certain extent. Correspondingly, the number of second magnets 462 can also be multiple, which allows multiple second magnets 462 to be arranged one-to-one on the side of the multiple connectors 482 facing the diaphragm 420.

[0063] Based on the above, in order to further reduce the size of the acoustic device 400 in the aforementioned thickness direction, optionally, in the electronic device disclosed in the embodiments of this application, such as Figure 1 and Figure 3 As shown, the vibrating element 430 can also be provided with multiple through holes 4311. During the assembly of the acoustic device 400, the multiple through holes 4311 correspond one-to-one with the multiple avoidance bends 4821. Simultaneously, a portion of each avoidance bend 4821 can extend along the thickness direction into the corresponding through hole 4311. In this case, the space occupied by the avoidance bend 4821 in the aforementioned thickness direction at least partially overlaps with the space originally occupied by the vibrating element 430. This significantly reduces or even eliminates the space originally occupied solely by the avoidance bend 4821 in the aforementioned thickness direction, thereby achieving the goal of reducing the overall size of the acoustic device 400 in the aforementioned thickness direction.

[0064] Specifically, the shape and size of the through hole 4311 can be set based on the corresponding avoidance bend 4821. When the size of the avoidance bend 4821 is relatively large, the size of the through hole 4311 corresponding to the avoidance bend 4821 can be appropriately increased. Conversely, the size of the corresponding through hole 4311 can be appropriately reduced so that the avoidance bend 4821 can move freely back and forth in the corresponding through hole 4311 along the thickness direction.

[0065] As described above, the second coil 452 can be fixedly connected to the vibrating element 430 by means of bonding or other methods. Considering that there is a mounting bracket 280480 (avoiding the bending portion 4821) between the second coil 452 and the vibrating element 430, in a specific embodiment of this application, a bridging member can be provided at one end of the second coil 452 near the vibrating element 430 so that the part of the second coil 452 not covered by the avoidance bending portion 4821 can be fixedly connected to the vibrating element 430 through the bridging member.

[0066] To further improve the assembly stability between the second coil 452 and the vibrating element 430, in this embodiment, the vibrating element 430 may include a mass block 431 and a plurality of connecting protrusions 433. The mass block 431 is provided with a plurality of through holes 4311, and the plurality of connecting protrusions 433 are fixedly connected to the side of the mass block 431 facing the diaphragm 420. In the direction surrounding the thickness, by providing connecting protrusions 433 between any two adjacent through holes 4311, the second coil can be directly fixedly connected to the end face of the plurality of connecting protrusions 433 away from the mass block 431 in the thickness direction of the diaphragm 420, thereby achieving the purpose of fixing the second coil to the mass block 431. This can further improve the driving stability of the second coil on the mass block 431, thereby improving the vibration effect of the mass block 431 and the entire vibrating element 430.

[0067] Specifically, the shape of the connecting protrusion 433 corresponds to the extension shape of the corresponding area in the second coil, so that when the second coil is connected to the corresponding connecting protrusion 433, the connection area between them can be maximized. This can further improve the reliability of the connection between the second coil and the mass block 431. Furthermore, each connecting protrusion 433 can be integrally molded and connected to the mass block 431 to further improve the connection reliability between the second coil and the entire vibrating element 430.

[0068] Furthermore, with the mounting bracket 480 located on the side of the first magnet 461 away from the diaphragm 420, the mounting bracket 480 will not significantly hinder the normal vibration process of the diaphragm 420. At the same time, by providing the aforementioned through hole 4311 in the mass block 431, the mounting bracket 480 will also not hinder the vibration process of the mass block 431, and the overall size of the acoustic device 400 in the aforementioned thickness direction can be relatively small.

[0069] As described above, embodiments of this application also provide an electronic device, in which, such as Figure 3 As shown, the acoustic device 400 is sandwiched between the cover 200 and the display screen 100, and the second end face of the base 411 in the acoustic device 400 is fixedly connected to the display screen 100.

[0070] Considering that the acoustic device 400 in the electronic device disclosed in this application has two independent sound-emitting capabilities, the size of the acoustic device 400 in the thickness direction of the diaphragm 420 may be larger compared to exciters or loudspeakers in related technologies that only have a single sound-emitting capability. Therefore, in the electronic device disclosed in this application, if the acoustic device 400 is mounted on one side of a circuit board 510 or a battery or similar structure along the thickness direction, it can be ensured that the acoustic device 400 can be normally powered. However, in this case, the adaptability of the electronic device's thickness may increase.

[0071] Based on the above, in order to ensure that the thickness of electronic devices using the acoustic devices disclosed in the above embodiments of this application does not increase excessively, or substantially does not increase the thickness, in a specific embodiment of this application, such as Figure 1 and Figure 2 As shown, the electronic device includes a circuit board 510 and a bracket 520. The circuit board 510 is mounted on the bracket 520, and the bracket 520 is fixedly connected to the frame 300, thereby enabling the circuit board 510 to form a stable assembly relationship with the frame 300. In this embodiment, the circuit board 510 has a first through hole 511, and the bracket 520 has a second through hole 521. During the assembly of the electronic device, the acoustic device 400 is embedded in the first through hole 511 and the second through hole 521, and the first coil 451 and the second coil 452 of the acoustic device 400 are both electrically connected to the circuit board 510.

[0072] That is, in the electronic device disclosed in the embodiments of this application, by providing a through structure on the circuit board 510 and the bracket 520 used to support the circuit board 510, it can be ensured that the acoustic device 400 and the circuit board 510 (and the bracket 520) can share a portion of the space in the aforementioned thickness direction. In this case, the thickness of the area where the acoustic device 400 is located in the electronic device can be significantly reduced, thereby reducing the maximum thickness of the entire electronic device, which is conducive to the development of electronic devices towards thinner and lighter designs.

[0073] In addition, foam 402 can be provided between circuit board 510 and bracket 520, and foam 402 can be provided between circuit board 510 and frame 300. Each foam 402 can surround the first through hole 511 and the second through hole 521 to further prevent sound leakage from acoustic device 400.

[0074] As described above, in the acoustic device, the diaphragm 420 can vibrate under the action of the first coil 451, and the sound emitted by the diaphragm 420 can be transmitted from inside the electronic device to outside the electronic device through the transmission medium such as air. Therefore, in the electronic device disclosed in the embodiments of this application, the diaphragm 420 of the acoustic device 400 can form a front sound cavity by the bracket 520 and the cover 200 (and a part of the frame 300), and by providing a sound outlet and other structures on at least one of the frame 300 and the cover 200, and making the sound outlet communicate with the space on the side of the diaphragm 420 in the acoustic device 400 away from the first coil, this will not damage the comprehensiveness and integrity of the display effect on the side where the display screen 100 is located, so as to maximize the display area of ​​the electronic device.

[0075] In order to prevent the sound hole from being blocked when the electronic device is used on a flat surface such as a table, and to improve the sound effect of the electronic device, in another embodiment of this application, the side wall of the frame 300 can be provided with a sound hole. That is, in the electronic device disclosed in the embodiments of this application, the sound hole is located on the side of the electronic device.

[0076] Meanwhile, in order to improve the sound output of the diaphragm 420 and minimize sound leakage from the acoustic device 400, the electronic device disclosed in this application embodiment may also include a sealing sheet 600, such as... Figure 2 As shown, the sealing piece 600 is fixedly and sealed to the side of the bracket 520 facing the cover 200, and the sealing piece 600 and the second through hole 521 form a front sound cavity, which is connected to the sound outlet hole.

[0077] Specifically, the sealing plate 600 can be made of materials such as metal, and it can be fixedly connected to the bracket 520 by means of adhesive bonding. This results in a relatively high sealing performance between the two. Compared to the relatively large coverage area of ​​the cover 200, the coverage area of ​​the sealing plate 600 is relatively small and highly targeted. By fixing the sealing plate 600 to the edge of the bracket 520, the sealing plate 600 and the bracket 520 can form the front sound cavity of the acoustic device, thereby significantly reducing or even eliminating sound leakage. In addition, by extending the second through hole 521 to the connection between the bracket 520 and the frame 300, and by connecting the second through hole 521 to the sound outlet, it can be ensured that the sound emitted by the diaphragm 420 can be transmitted to the outside of the electronic device through the second through hole 521 (i.e., the front sound cavity) and the sound outlet.

[0078] Of course, in order to prevent moisture and dust from entering the electronic device through the sound outlet and damaging the diaphragm 420 and other components, the electronic device disclosed in this application embodiment is provided with a waterproof and breathable membrane 401 in the area between the diaphragm 420 and the sound outlet in the front sound cavity.

[0079] 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.

[0080] 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. An acoustic device, characterized in that, It includes a base, a diaphragm, a vibrating element, an elastic component, a first coil, a second coil, and a driving magnet, wherein; The diaphragm is mounted on the first end face of the base, and the first coil is connected to the diaphragm. The first coil cooperates with the driving magnet to drive the diaphragm to vibrate in its own thickness direction. The vibrating element is disposed on the side of the driving magnet away from the diaphragm, and the vibrating element is movably connected to the base through the elastic component. The second coil is connected to the vibrating element, and the second coil cooperates with the driving magnet to drive the vibrating element to vibrate in the thickness direction.

2. The acoustic device according to claim 1, characterized in that, The acoustic device further includes a fixing plate and a mounting bracket, the fixing plate being fixed to the second end face of the base, and the mounting bracket being fixedly connected to the base; In the thickness direction, the mounting bracket is located between the diaphragm and the fixed plate, the driving magnet is connected to the side of the mounting bracket facing the diaphragm, and the vibrating element is located between the fixed plate and the mounting bracket; The elastic component includes a first elastic element and a second elastic element. The first elastic element is elastically disposed between the mounting frame and the vibrating element, and the second elastic element is disposed between the vibrating element and the fixed plate.

3. The acoustic device according to claim 1, characterized in that, The driving magnet includes a first magnet and a second magnet. In the thickness direction, the first magnet and the second magnet are both sandwiched between the diaphragm and the vibrating element, and the first coil is located on the side of the second coil closer to the diaphragm. At least a portion of the first coil and the second coil are respectively sleeved outside the first magnet, and the second magnet is disposed on the outer periphery of at least a portion of the first coil and the second coil. Among the magnetic poles of the first magnet and the second magnet near the diaphragm, one is the N pole and the other is the S pole.

4. The acoustic device according to claim 3, characterized in that, The acoustic device further includes a first magnetic conductive element, wherein the first magnetic conductive element is provided on at least one of the two sides of the first magnet facing and away from the diaphragm, and the first magnetic conductive element is disposed opposite to the first magnet in the thickness direction; The acoustic device further includes a second magnetic conductor, wherein the second magnetic conductor is provided on at least one of the two sides of the second magnet facing and away from the diaphragm, and the second magnetic conductor is disposed opposite to the second magnet in the thickness direction.

5. The acoustic device according to claim 3, characterized in that, The acoustic device further includes a mounting frame, which includes a frame body and a connector. In the thickness direction, the frame body is located between the first magnet and the vibrating element, and the first magnet is connected to the frame body. The connector is connected to the outer periphery of the frame and to the base, and the second magnet is located on the side of the connector facing the diaphragm; The connector is provided with a bend-avoidance portion. In the thickness direction, the bend-avoidance portion protrudes away from the frame from the diaphragm. In the thickness direction, at least a portion of the second coil is accommodated within the bend-avoidance portion.

6. The acoustic device according to claim 5, characterized in that, The number of the second magnet and the connector is multiple. The multiple connectors are spaced apart in the direction surrounding the thickness direction. Each connector is provided with the avoidance bending portion. The multiple second magnets are correspondingly arranged on the side of the multiple connectors facing the diaphragm. The vibrating element is provided with a plurality of through holes, and the plurality of through holes correspond one-to-one with the plurality of avoidance bends, and at least a portion of each avoidance bend extends into the corresponding through hole along the thickness direction.

7. The acoustic device according to claim 6, characterized in that, The vibrating element includes a mass block and a plurality of connecting protrusions. The mass block has a plurality of through holes, and each of the connecting protrusions is fixedly connected to the side of the mass block facing the diaphragm. In the direction surrounding the thickness direction, a connecting protrusion is provided between any two adjacent through holes. In the thickness direction, the second coil is fixedly connected to the end face of the plurality of connecting protrusions away from the mass block.

8. An electronic device, characterized in that, Includes a display screen, a cover, a frame, and the acoustic device according to any one of claims 1-7, wherein, The display screen is installed on one side of the frame, the cover is installed on the other side of the frame, the acoustic device is disposed between the display screen and the cover, and the second end face of the base of the acoustic device is fixedly connected to the display screen.

9. The electronic device according to claim 8, characterized in that, The electronic device includes a circuit board and a bracket. The circuit board is mounted on the bracket, and the bracket is fixedly connected to the frame. The circuit board has a first through hole, and the bracket has a second through hole. The acoustic device is embedded in the first through hole and the second through hole, and the first coil and the second coil of the acoustic device are both electrically connected to the circuit board.

10. The electronic device according to claim 9, characterized in that, The electronic device also includes a sealing plate, which is fixedly and sealed to the side of the bracket facing the cover. The sealing plate and the second through hole form a front sound cavity. The side wall of the frame is provided with a sound outlet hole, and the front sound cavity communicates with the sound outlet hole.

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