Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment. The sound production device comprises a vibration assembly, a voice coil and a connecting column, the vibration assembly comprises a first vibrating diaphragm and a second vibrating diaphragm which are oppositely arranged in the first direction, the voice coil is located between the first vibrating diaphragm and the second vibrating diaphragm and connected with the first vibrating diaphragm, one end of the connecting column is connected with the first vibrating diaphragm, and the other end of the connecting column is connected with the second vibrating diaphragm.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and more particularly to sound-generating devices and electronic equipment. Background Technology

[0002] With the development of science and technology, electronic devices with sound-generating capabilities have emerged rapidly, such as smart glasses, mobile phones, and tablets. For these electronic devices, the sound-generating device is an essential component, and its performance directly affects the user experience.

[0003] Currently, improving the sound leakage prevention performance of sound-generating devices is one of the technical problems that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The sound-generating device according to the first aspect of this application includes a vibrating component, a voice coil, and a connecting post. The vibrating component includes a first diaphragm and a second diaphragm disposed opposite to each other in a first direction. The voice coil is located between the first diaphragm and the second diaphragm and is connected to the first diaphragm. One end of the connecting post is connected to the first diaphragm, and the other end is connected to the second diaphragm.

[0005] According to one embodiment of this application, the connecting column is a hollow structure.

[0006] According to one embodiment of this application, the connecting column includes a column body, a first flange and a second flange. The column body extends along the first direction. The first flange surrounds one end of the column body, and the second flange surrounds the other end of the column body. The surface of the first flange facing away from the second flange is connected to the first diaphragm, and the surface of the second flange facing away from the first flange is connected to the second diaphragm.

[0007] According to one embodiment of this application, the sound-generating device further includes a connector, one end of which is connected to the voice coil and the other end of which is connected to the second diaphragm.

[0008] According to one embodiment of this application, the connector includes a first connecting portion and a second connecting portion. The first connecting portion is located on one side of the voice coil along a second direction and is connected to the voice coil. The second connecting portion is located on the side of the voice coil facing the second diaphragm along the first direction and is connected to the first connecting portion and the second diaphragm respectively. The first direction intersects the second direction.

[0009] According to one embodiment of this application, the voice coil is annular, and the first connecting portion is connected to the inner sidewall of the voice coil.

[0010] According to one embodiment of this application, the end face of the second connecting portion opposite to the second diaphragm is connected to the voice coil.

[0011] According to one embodiment of this application, the voice coil extends in a direction intersecting the first direction, and the number of connectors is multiple, with the multiple connectors spaced apart along the extension direction of the voice coil.

[0012] According to one embodiment of this application, the sound-generating device further includes a support member, and the plurality of connecting members are connected to the second diaphragm through the support member.

[0013] According to one embodiment of this application, the voice coil includes a first portion and a second portion disposed opposite to each other in a second direction, and the sound-generating device further includes a magnetic circuit assembly; the magnetic circuit assembly includes a central magnet and a side magnet structure, the central magnet has a first clearance hole through which the connecting post passes, the side magnet structure and the central magnet have a first magnetic gap and a second magnetic gap, the first magnetic gap is located on one side of the central magnet along the second direction, the second magnetic gap is located on the other side of the central magnet along the second direction, at least a portion of the first portion is located in the first magnetic gap, and at least a portion of the second portion is located in the second magnetic gap.

[0014] According to one embodiment of this application, the side magnet structure includes a first side magnet and a second side magnet. The first side magnet is located on one side of the central magnet along a second direction, and a first magnetic gap is formed between the first side magnet and the central magnet. The second side magnet is located on the other side of the central magnet along the second direction, and a second magnetic gap is formed between the second side magnet and the central magnet.

[0015] According to one embodiment of this application, the edge magnet structure includes an annular edge magnet, which surrounds the periphery of the central magnet and has a first magnetic gap and a second magnetic gap with the central magnet.

[0016] According to one embodiment of this application, the connector is at least connected to the surface of the voice coil facing the central magnet, and the side of the central magnet facing the voice coil is provided with a clearance groove corresponding to the connector.

[0017] According to one embodiment of this application, the magnetic circuit assembly further includes a magnetic circuit support plate, which is located along the first direction on the side of the central magnet away from the first diaphragm. Both the central magnet and the side magnet structure are disposed on the magnetic circuit support plate, and the magnetic circuit support plate has a second clearance hole corresponding to the connecting post.

[0018] According to one embodiment of this application, the connector is at least connected to the surface of the voice coil facing the central magnet, and the magnetic circuit support plate has a third clearance hole corresponding to the connector.

[0019] According to one embodiment of this application, the side magnet structure includes a first side magnet and a second side magnet. The first side magnet and the second side magnet are respectively located on both sides of the central magnet in the second direction. The first side magnet and the central magnet have a first magnetic gap, and the second side magnet and the central magnet have a second magnetic gap. The magnetic circuit support plate includes a plate body and two surrounding plates. The plate body is disposed opposite to the central magnet along the first direction. The plate body has a first clearance hole. The two surrounding plates are respectively located at both ends of the plate body along a third direction. The first side magnet and the second side magnet are both located between the two surrounding plates to form a cavity that accommodates the voice coil and the central magnet together with the two surrounding plates. The first direction, the second direction, and the third direction intersect each other.

[0020] According to one embodiment of this application, the sound-generating device further includes a first housing, a first folded ring, and a second folded ring. The first housing has a first receiving cavity. The wall of the first housing has a first opening and a second opening that communicate with the first receiving cavity and are disposed opposite to each other in the first direction. The voice coil and the connecting post are located in the receiving cavity. The first diaphragm is located in the first opening, and the second diaphragm is located in the second opening. The first folded ring surrounds the first diaphragm and is embedded in the first opening, and the second folded ring surrounds the second diaphragm and is embedded in the second opening.

[0021] According to one embodiment of this application, the sound-generating device further includes a second housing, the second housing having a second receiving cavity, the wall of the second housing having a first sound outlet and a second sound outlet communicating with the second receiving cavity, the first housing being located inside the second receiving cavity, the first sound outlet and the second sound outlet being located on both sides of the first housing along a second direction, the first direction and the second direction intersecting.

[0022] According to one embodiment of this application, in the first direction, the first sound outlet is closer to the first diaphragm than the second sound outlet.

[0023] The electronic device provided according to the second aspect of this application includes the sound-generating device described in the first aspect of this application.

[0024] The sound-generating device provided in this application has a voice coil connected to a first diaphragm, and a connecting post is provided between the first and second diaphragms. The two ends of the connecting post are respectively connected to the first and second diaphragms. Therefore, when the voice coil drives the first diaphragm to vibrate in a first direction, the first diaphragm will also drive the second diaphragm to vibrate synchronously in the same direction through the connecting post, thereby driving the surrounding air to vibrate and produce sound. It can be seen that the sound-generating device in this application has a single voice coil + double diaphragm structure. By setting a connecting post between the first and second diaphragms, not only can one voice coil drive two diaphragms, namely the first and second diaphragms, to vibrate and produce sound, reducing costs and simplifying the structure, but also the first and second diaphragms can vibrate in the same direction, thereby ensuring the consistency of the amplitude of the sound radiated forward and backward by the sound-generating device, and making the phase of the sound radiated forward and the phase of the sound radiated backward opposite in the far field, that is, there is a 180° phase difference, which effectively cancels out the phase difference, thereby significantly improving the sound leakage prevention performance of the sound-generating device.

[0025] It should be understood that the description in this section is not intended to identify key or important features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0026] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The drawings are provided for a better understanding of the invention and are not intended to limit the scope of this application.

[0027] In the attached diagram:

[0028] Figure 1 This is a cross-sectional schematic diagram of a sound-generating device according to one embodiment of this application;

[0029] Figure 2 This is a cross-sectional schematic diagram of a sound-generating device according to another embodiment of this application;

[0030] Figure 3 This is a cross-sectional schematic diagram of a sound-generating device according to yet another embodiment of this application;

[0031] Figure 4 This is a perspective view of a sound-generating device (without vibration assembly, connecting column and connector) according to one embodiment of this application from one angle.

[0032] Figure 5 This is a perspective view of a sound-generating device (excluding the vibration assembly, connecting column, and connector) according to one embodiment of this application from another angle.

[0033] Figure 6This is a perspective view of a sound-generating device (vibration removal component) according to one embodiment of this application from one angle;

[0034] Figure 7 This is a bottom view schematic diagram of a sound-generating device (vibration removal component) according to one embodiment of this application;

[0035] Figure 8 This is an assembly diagram of the connector and support member according to one embodiment of this application;

[0036] Figure 9 This is a perspective view of a central magnet according to one embodiment of this application;

[0037] Figure 10 This is a perspective view of a connecting post according to one embodiment of this application;

[0038] Figure 11 This is a perspective view of a second housing from one angle according to one embodiment of this application;

[0039] Figure 12 This is a perspective view of the second housing from another angle according to one embodiment of this application.

[0040] Figure label:

[0041] 100. First diaphragm; 110. Second diaphragm; 200. Voice coil; 210. First part;

[0042] 220. Part Two; 230. Part Three; 240. Part Four; 300. Connecting Post;

[0043] 310. Column; 320. First flange; 330. Second flange; 400. Connector;

[0044] 410. First connecting part; 420. Second connecting part; 500. Support member;

[0045] 601. First magnetic gap; 602. Second magnetic gap; 610. Central magnet;

[0046] 611. First clearance hole; 612. Clearance groove; 620. First side magnet;

[0047] 630. Second side magnet; 640. Magnetic circuit support plate; 641. Second clearance hole;

[0048] 642. Third clearance hole; 643. Plate; 644. Enclosure plate; 645. Cavity;

[0049] 700. First housing; 710. First folding ring; 720. Second folding ring;

[0050] 800. Second housing; 801. First sound outlet; 802. Second sound outlet;

[0051] 810, First subshell; 820, Second subshell. Detailed Implementation

[0052] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or state relationship based on the orientation or state relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0054] In the embodiments of this application, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] The exemplary embodiments of this application are described below with reference to the accompanying drawings, including various details of the embodiments to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0056] It should be noted that, where there is no conflict, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0057] Currently, sound-generating devices generally include a diaphragm, a voice coil, and a magnetic circuit assembly. The voice coil is connected to the diaphragm, and the magnetic circuit assembly provides a magnetic field to the voice coil. When an alternating current is passed through the voice coil, it vibrates under the influence of the magnetic field, which in turn drives the diaphragm to vibrate synchronously and produce sound. The sound-generating device radiates sound both forward and backward, with the sound radiated forward and backward differing by 180° in phase. In the far field, the sound radiated forward and backward cancel each other out due to the 180° phase difference.

[0058] However, due to the poor consistency of sound radiation from the front and rear of existing sound-generating devices, that is, the frequency response of the sound emitted from the front and rear is inconsistent, the sound radiated from the front and rear of the sound-generating device has a large difference in the far field and cannot be well phase-counteracted in the far field, thus affecting the sound leakage prevention performance of the sound-generating device.

[0059] Based on this, such as Figure 1 As shown, this application provides another sound-generating device, which includes a vibration component, a voice coil 200, and a connecting post 300. The vibration component includes a first diaphragm 100 and a second diaphragm 110 disposed opposite each other in a first direction. The voice coil 200 is located between the first diaphragm 100 and the second diaphragm 110 and is connected to the first diaphragm 100. One end of the connecting post 300 is connected to the first diaphragm 100, and the other end of the connecting post 300 is connected to the second diaphragm 110.

[0060] Since the voice coil 200 is connected to the first diaphragm 100 in this embodiment, and a connecting post 300 is provided between the first diaphragm 100 and the second diaphragm 110, with the two ends of the connecting post 300 connected to the first diaphragm 100 and the second diaphragm 110 respectively, when the voice coil 200 drives the first diaphragm 100 to vibrate in the first direction, the first diaphragm 100 will also drive the second diaphragm 110 to vibrate synchronously and in the same direction through the connecting post 300, thereby pushing the surrounding air to vibrate and produce sound. As can be seen, the sound-generating device in this embodiment has a single voice coil and a dual-diaphragm structure. By setting a connecting post 300 between the first diaphragm 100 and the second diaphragm 110, not only can one voice coil 200 drive two diaphragms, namely the first diaphragm 100 and the second diaphragm 110, to vibrate and generate sound, reducing costs and simplifying the structure, but also the first diaphragm 100 and the second diaphragm 110 can vibrate in the same direction, thereby ensuring the consistency of the amplitude of the sound radiated forward and backward by the sound-generating device. Furthermore, the sound radiated forward and the sound radiated backward by the sound-generating device are out of phase in the far field, i.e., there is a 180° phase difference, which effectively cancels out the phase difference, thus significantly improving the sound leakage prevention performance of the sound-generating device. In addition, the dual-diaphragm design naturally forms two support points in the amplitude direction, i.e., the first direction, ensuring that the voice coil 200 and the connecting post 300 vibrate along the normal direction of the first diaphragm 100 and the second diaphragm 110, i.e., the first direction, without polarization, thereby achieving vibration with a larger amplitude.

[0061] It should be noted that the vibration directions of the first diaphragm 100 and the second diaphragm 110 are parallel to a first direction, which is generally parallel to the thickness direction of the first diaphragm 100 and the second diaphragm 110. For example, the first direction can be the z-direction in the attached figure. "Forward" in the above text can refer to the positive or negative z-direction, while "backward" generally refers to the direction opposite to the forward direction. Furthermore, the voice coil 200 can be, but is not limited to, fixed to the surface of the first diaphragm 100 facing the second diaphragm 110 by adhesive or snap-fit. The voice coil 200 can be made of voice coil wire, which can be a highly ductile material such as enameled wire. The stronger the ductility of the voice coil wire, the stronger its ability to undergo irreversible deformation, and thus the easier it is to wind and shape.

[0062] In some implementations, such as Figure 10 As shown, the connecting post 300 can be a hollow structure. This design not only reduces the weight of the connecting post 300, thereby reducing its influence on the amplitude of the first diaphragm 100 and the second diaphragm 110, but also allows for a larger dimension of the hollow connecting post 300 perpendicular to the first direction, given a fixed weight. This increases the contact area between the connecting post 300 and the first diaphragm 100 and the second diaphragm 110. The cross-sectional shape of the first connecting post 300 perpendicular to the first direction can be, but is not limited to, circular, elliptical, polygonal, or irregular.

[0063] As an example, such as Figure 10 As shown, the connecting post 300 includes a post body 310 and a first flange 320 and a second flange 330 connected to the post body 310. The post body 310 extends along a first direction. The first flange 320 surrounds one end of the post body 310, and the second flange 330 surrounds the other end of the post body 310. The surface of the first flange 320 facing away from the second flange 330 is connected to the surface of the first diaphragm 100 facing the second diaphragm 110, and the surface of the second flange 330 facing away from the first flange 320 is connected to the surface of the second diaphragm 110 facing the first diaphragm 100. The first flange 320 and the second flange 330 can be integrally formed with the post body 310, or they can be fixed to the post body 310 by means of bonding, threaded connection, or snap-fit.

[0064] Considering that the first diaphragm 100 and the second diaphragm 110 are usually relatively thin, in order to make the vibration modes of the first diaphragm 100 and the second diaphragm 110 more consistent, such as Figure 2 As shown, the sound-generating device also includes a connector 400, one end of which is connected to the voice coil 200, and the other end is connected to the second diaphragm 110. In this case, along the first direction, one side of the voice coil 200 is connected to the first diaphragm 100, and the other side of the voice coil 200 is connected to the second diaphragm 110 via the connector 400. Thus, while the voice coil 200 transmits vibrational energy to the first diaphragm 100, it also transmits vibrational energy to the second diaphragm 110 via the connector 400. At the same time, the first diaphragm 100 also transmits vibrational energy to the second diaphragm 110 via the connecting post 300. Therefore, with the combined assistance of the connecting post 300 and the connector 400, it can be ensured that the first diaphragm 100 and the second diaphragm 110 can vibrate synchronously and in the same direction, so that the vibration modes of the first diaphragm 100 and the second diaphragm 110 can be kept consistent. In other words, the amplitudes of the first diaphragm 100 and the second diaphragm 110 are the same but their phases are opposite.

[0065] To increase the contact area between the connector 400 and the voice coil 200, thereby improving the connection strength between them and preventing the connector 400 from detaching from the voice coil 200 due to insufficient connection strength during vibration, the connector 400 can be connected to the sidewall of the voice coil 200 extending along the first direction. The connector 400 can be connected to the voice coil 200 by, but is not limited to, adhesive, screws, or snap-fit ​​methods. For example, ... Figure 2 and Figure 8As shown, the connector 400 includes a first connecting portion 410 and a second connecting portion 420. The first connecting portion 410 is located on one side of the voice coil 200 along a second direction, and its surface facing the voice coil 200 is connected to the voice coil 200. The second connecting portion 420 is located on the side of the voice coil 200 facing the second diaphragm 110 along a first direction, and its second connecting portion 420 is connected to both the first connecting portion 410 and the second diaphragm 110. The first direction intersects the second direction. For example, one end of the sidewall of the second connecting portion 420 is connected to a portion of the sidewall of the first connecting portion 410 facing the central magnet 610, and the other end of the second connecting portion 420 is connected to the second diaphragm 110. Since a portion of the connector 400, namely the first connecting portion 410, is located on one side of the voice coil 200 along the second direction in this embodiment, the connector 400 can contact the sidewall of the voice coil 200 extending along the first direction. Compared to the end face of the voice coil 200, i.e., the surface of the voice coil 200 facing away from the first diaphragm 100 in the first direction, the area of ​​the sidewall of the voice coil 200 extending along the first direction is larger, thereby significantly increasing the contact area between the connector 400 and the voice coil 200, and thus improving the connection strength between the connector 400 and the voice coil 200. It should be noted that the intersection of the first direction and the second direction can generally be understood as having an angle between the first direction and the second direction. For example, the first direction and the second direction are perpendicular or approximately perpendicular to each other. As an example, in this embodiment, the first direction can be the z-direction in the figures, and the second direction can be the x-direction in the figures. When the first direction and the second direction are perpendicular, the projection of the connector 400 on a plane parallel to the first direction and the second direction is approximately Z-shaped.

[0066] As an example, the voice coil 200 can be ring-shaped, and the first connecting part 410 can be connected to either the inner wall of the voice coil 200 or the outer wall of the voice coil 200. In other words, the first connecting part 410 can be located either inside or outside the voice coil 200.

[0067] To further increase the contact area between the connector 400 and the voice coil 200, thereby improving the connection strength between them, the connector 400, in addition to connecting to the sidewall of the voice coil 200 extending along the first direction, can also connect to the end face of the voice coil 200, i.e., the surface of the voice coil 200 facing away from the first diaphragm 100. As an example, the end face of the second connecting portion 420 facing away from the second diaphragm 110 is connected to the surface of the voice coil 200 facing the second diaphragm 110. This arrangement not only further increases the contact area between the connector 400 and the voice coil 200, but also allows the voice coil 200 to limit the connection of the connector 400 in the first direction.

[0068] like Figure 6As shown, to make the force on the second diaphragm 110 more uniform, the number of connectors 400 can be multiple. The voice coil 200 extends along a direction intersecting the first direction, and the multiple connectors 400 are spaced apart along the extension direction of the voice coil 200. As an example, the voice coil 200 is annular, and the multiple connectors 400 are spaced apart along the circumferential direction of the voice coil 200. For example, six connectors 400 are equally spaced along the circumferential direction of the voice coil 200. In the embodiments of this application, the number of voice coils 200 is not limited to six; the number of voice coils 200 can be less than six or more than six, and this application does not limit this.

[0069] In some embodiments, the sound-generating device may further include a support member 500, with multiple connectors 400 connected to the second diaphragm 110 via the support member 500. That is, one end of the connector 400 is connected to the voice coil 200, and the other end of the connector 400 is connected to the support member 500. The side of the support member 500 facing away from the connector 400 is connected to the second diaphragm 110. For example, when the voice coil 200 is annular and the multiple connectors 400 are spaced apart along the circumferential direction of the voice coil 200, the support member 500 may also be annular, with the support member 500 and the voice coil 200 arranged opposite to each other in the first direction.

[0070] like Figure 1 and Figure 9 As shown, the sound-generating device may further include a magnetic circuit assembly located between the first diaphragm 100 and the second diaphragm 110. The magnetic circuit assembly provides a magnetic field to the voice coil 200, causing the voice coil 200 to vibrate under the influence of the magnetic field when an alternating current is applied. As an example, the magnetic circuit assembly includes a central magnet 610 and a side magnet structure. The central magnet 610 has a first clearance hole 611 through which a connecting post 300 passes. The side magnet structure and the central magnet 610 have a first magnetic gap 601 and a second magnetic gap 602. The first magnetic gap 601 is located on one side of the central magnet 610 along a second direction, and the second magnetic gap 602 is located on the other side of the central magnet 610 along the second direction. At least a portion of the voice coil 200 is located within the first magnetic gap 601 and the second magnetic gap 602. For example, combined with… Figure 4 As shown, the voice coil 200 includes a first portion 210 and a second portion 220 disposed opposite to each other in a second direction. At least a portion of the first portion 210 is located in a first magnetic gap 601, and at least a portion of the second portion 220 is located in a second magnetic gap 602.

[0071] In some implementations, such as Figure 1As shown, the side magnet structure may include a first side magnet 620 and a second side magnet 630. The first side magnet 620 is located on one side of the central magnet 610 along the second direction, and the second side magnet 630 is located on the side of the central magnet 610 away from the first side magnet 620 along the second direction. In other words, in the second direction, the first side magnet 620 and the second side magnet 630 are respectively located on both sides of the central magnet 610. The first side magnet 620 and the second side magnet 630 are both spaced apart from the central magnet 610. There is a first magnetic gap 601 between the first side magnet 620 and the central magnet 610, and there is a second magnetic gap 602 between the second side magnet 630 and the central magnet 610.

[0072] In this embodiment, the central magnet 610, the first side magnet 620, and the second side magnet 630 are all magnetized along a first direction. The magnetization direction of the first side magnet 620 and the second side magnet 630 are opposite to the magnetization direction of the central magnet 610. For example, the magnetic pole of the central magnet 610 facing the first diaphragm 100 is the N pole, and the magnetic pole of the central magnet 610 away from the first diaphragm 100 is the S pole. The magnetic poles of the first side magnets 620 and 630 facing the first diaphragm 100 are both S poles, and the magnetic poles of the first side magnets 620 and 630 away from the first diaphragm 100 are both N poles. Of course, the magnetic pole of the central magnet 610 facing the first diaphragm 100 can also be the S pole, and the magnetic poles of the first side magnets 620 and 630 facing the first diaphragm 100 can also both be N poles. Thus, a magnetic circuit can be formed between the central magnet 610 and the first side magnet 620, and between the central magnet 610 and the second side magnet 630. When an alternating current is passed through the voice coil 200, the voice coil 200 vibrates along the first direction under the action of the magnetic field in the first magnetic gap 601 and the second magnetic gap 602. Since the first diaphragm 100 and the second diaphragm 110 are connected by a connecting post 300, and the side of the voice coil 200 facing away from the first diaphragm 100 is connected to the second diaphragm 110 through a connector 400, when the voice coil 200 vibrates, it transmits vibrational energy to the first diaphragm 100 and also to the second diaphragm 110 through the connector 400. At the same time, the first diaphragm 100 also transmits vibrational energy to the second diaphragm 110 through the connecting post 300. Thus, with the combined assistance of the connecting post 300 and the connector 400, the first diaphragm 100 and the second diaphragm 110 can vibrate synchronously and in the same direction, so that the vibration modes of the first diaphragm 100 and the second diaphragm 110 can be kept consistent. In other words, the amplitudes of the first diaphragm 100 and the second diaphragm 110 are the same but the phases are opposite. Therefore, the sound-generating device radiates sound both forward and backward simultaneously. The amplitudes of the sound radiated forward and backward are the same, but the sound radiated forward and backward are out of phase in the far field, i.e., there is a 180° phase difference. This allows for effective anti-phase superposition and cancellation, significantly improving the sound leakage prevention performance of the sound-generating device.

[0073] It should be noted that in the embodiments of this application, there can be multiple voice coils 200, which are spaced apart in the second direction. In this case, there are multiple central magnets 610, and at least one of the first side magnets 620 and the second side magnets 630 is multiple. The first side magnets 620 and the second side magnets 630 can be alternately distributed in the second direction, and the central magnet 610 is located between adjacent first side magnets 620 and second side magnets 630. For example, the sound-generating device includes two central magnets 610, two first side magnets 620, and one second side magnet 630. The two first side magnets 620 are spaced apart in a second direction, and the second side magnet 630 is located between the two first side magnets 620. One central magnet 610 is located between one of the first side magnets 620 and the second side magnet 630, and the other central magnet 610 is located between the other first side magnet 620 and the second side magnet 630. A first magnetic gap 601 is formed between the central magnet 610 and the adjacent first side magnet 620, and a second magnetic gap 602 is formed between the central magnet 610 and the second side magnet 630.

[0074] In this embodiment, the material of the central magnet 610 may include, but is not limited to, magnets or magnetic steel. The central magnet 610 may be a plate-like structure, with its dimension along a third direction being larger than its dimension along a second direction. The first, second, and third directions intersect each other. Similarly, the materials of the first and second side magnets 620 and 630 may include, but are not limited to, magnets or magnetic steel. The first and second side magnets 620 and 630 may also be plate-like. Taking the first side magnet 620 as an example, its dimension along a third direction is larger than its dimension along a second direction, and its dimension along a second direction may be smaller than the dimension of the central magnet 610 along a second direction. Furthermore, the first and second side magnets 620 may be symmetrical or asymmetrical about the central magnet 610; this application does not limit this. It should be noted that the intersecting of the first, second, and third directions can generally be understood as having an angle between the first and second directions, between the second and third directions, and between the first and third directions. For example, the first direction and the second direction are perpendicular or approximately perpendicular to each other, the second direction and the third direction are perpendicular or approximately perpendicular to each other, and the first direction and the third direction are perpendicular or approximately perpendicular to each other. As an example, in the embodiments of this application, the first direction can be the z-direction in the figures, the second direction can be the x-direction in the figures, and the third direction can be the y-direction in the figures.

[0075] In some other embodiments, the side magnet structure includes an annular side magnet (not shown) surrounding the central magnet 610. A first magnetic gap 601 and a second magnetic gap 602 are located between the annular side magnet and the central magnet 610, respectively, on either side of the central magnet 610 in a second direction. Both the central magnet 610 and the annular side magnet are magnetized along a first direction, with the magnetization direction of the central magnet 610 opposite to that of the annular side magnet. For example, the magnetic pole of the central magnet 610 facing the first diaphragm 100 is the N pole, and the magnetic pole of the central magnet 610 facing away from the first diaphragm 100 is the S pole; similarly, the magnetic pole of the annular side magnet facing the first diaphragm 100 is the S pole, and the magnetic pole of the annular side magnet facing away from the first diaphragm 100 is the N pole. Of course, the magnetic pole of the central magnet 610 facing the first diaphragm 100 can also be the S pole, and the magnetic pole of the annular side magnet facing the first diaphragm 100 can also be the N pole.

[0076] In some implementations, such as Figure 4 As shown, the voice coil 200 may include, in addition to the first part 210 and the second part 220, a third part 230 and a fourth part 240 disposed opposite each other in a third direction. The first part 210 and the second part 220 are located between the third part 230 and the fourth part 240. The first part 210, the third part 230, the second part 220 and the fourth part 240 are connected end to end in sequence, and the first direction, the second direction and the third direction intersect each other in pairs. The first part 210, the second part 220, the third part 230 and the fourth part 240 can be integrally formed.

[0077] In some embodiments, the connector 400 is connected at least to the surface of the voice coil 200 facing the central magnet 610. To reduce the overall size of the sound-generating device in the second direction and achieve miniaturization, such as... Figure 2 and Figure 9 As shown, a clearance groove 612 corresponding to the connector 400 can be formed on the side of the central magnet 610 facing the voice coil 200, so that the portion of the connector 400 that connects to the surface of the voice coil 200 facing the central magnet 610 can be located within the clearance groove 612. Taking the connector 400 including a first connecting portion 410 and a second connecting portion 420 as an example, the first connecting portion 410 is connected to the surface of the voice coil 200 facing the central magnet 610, and at least a portion of the first connecting portion 410 is located within the clearance groove 612 in a second direction. In other words, on a plane perpendicular to a third direction, the projection of the first connecting portion 410 and the projection of the clearance groove 612 at least partially overlap.

[0078] like Figure 2 and Figure 6As shown, the magnetic circuit assembly may further include a magnetic circuit support plate 640. The magnetic circuit support plate 640 is located along a first direction on the side of the central magnet 610 away from the first diaphragm 100. Both the central magnet 610 and the side magnet structure are disposed on the magnetic circuit support plate 640. The voice coil 200 is located in the first direction between the first diaphragm 100 and the magnetic circuit support plate 640. The magnetic circuit support plate 640 has a second clearance hole 641 corresponding to the connecting post 300. One end of the connecting post 300 is connected to the first diaphragm 100, and the other end of the connecting post 300 passes through the first clearance hole 611 and the second clearance hole 641 in sequence and is connected to the second diaphragm 110. The magnetic circuit support plate 640 may be connected to the central magnet 610 and the side magnet structure by means of bonding, clipping, or screws, and the material of the magnetic circuit support plate 640 may include, but is not limited to, low-carbon steel or plastic.

[0079] In this embodiment, by setting a magnetic circuit support plate 640 on the same side of the central magnet 610 and the side magnet structure, the magnetic circuit support plate 640 can cover the side of the first magnetic gap 601 and the second magnetic gap 602 away from the first diaphragm 100, thereby constraining the magnetic lines of force of the central magnet 610 and the side magnet structure, increasing the magnetic flux intensity at the first magnetic gap 601 and the second magnetic gap 602, thereby not only improving the vibration intensity of the voice coil 200, but also preventing magnetic leakage of the sound-generating device.

[0080] When the connector 400 is connected to at least the surface of the voice coil 200 facing the central magnet 610, the magnetic circuit support plate 640 may also have a third clearance hole 642 corresponding to the connector 400. One end of the connector 400 is connected to the voice coil 200, and the other end of the connector 400 passes through the third clearance hole 642 and is connected to the second diaphragm 110. It should be noted that the connector 400 can be directly connected to the second diaphragm 110, or it can be indirectly connected to the second diaphragm 110 through other components such as the support member 500. As an example, such as... Figure 4As shown, the side magnet structure includes a first side magnet 620 and a second side magnet 630. The magnetic circuit support plate 640 may include a plate body 643 and two surrounding plates 644. The plate body 643 is arranged opposite to the central magnet 610 along a first direction. The two surrounding plates 644 are respectively located at both ends of the plate body 643 along a third direction. The plate body 643 has a first clearance hole 611 and a third clearance hole 642. The central magnet 610, the first side magnet 620 and the second side magnet 630 are all located on the side of the plate body 643 away from the second diaphragm 110. The first side magnet 620 and the second side magnet 630 are all located on the side of the plate body 643 away from the second diaphragm 110. Between the two enclosure plates 644, one end of the first side magnet 620 contacts the end of one of the enclosure plates 644, and the other end of the first side magnet 620 contacts the end of the other enclosure plate 644. One end of the second side magnet 630 contacts the end of one of the enclosure plates 644 away from the first side magnet 620, and the other end of the second side magnet 630 contacts the end of the other enclosure plate 644 away from the first side magnet 620. The first side magnet 620 and the second side magnet 630, together with the two enclosure plates 644, form a cavity 645 that accommodates the voice coil 200 and the center magnet 610.

[0081] In some embodiments, the magnetic circuit assembly may further include a central magnetic guide plate (not shown), located on the side of the central magnet 610 facing the first diaphragm 100. The shape of the central magnetic guide plate may be adapted to the shape of the central magnet 610; in other words, the shape of the central magnetic guide plate may be the same as that of the central magnet 610. For example, the central magnetic guide plate may be plate-shaped, with its dimension along a third direction being larger than its dimension along a second direction. Furthermore, the central magnetic guide plate may be fixed to the surface of the central magnet 610 facing the first diaphragm 100 by means of bonding, snap-fitting, or screw connection, and the material of the central magnetic guide plate may include, but is not limited to, low-carbon steel. By providing a central magnetic guide plate on one side of the central magnet 610, the magnetic lines of force of the central magnet 610 can be constrained by the central magnetic guide plate, thereby increasing the magnetic flux intensity at the first magnetic gap 601 and the second magnetic gap 602, and thus improving the vibration intensity of the voice coil 200.

[0082] In some embodiments, when the side magnet structure includes a first side magnet 620 and a second side magnet 630, the magnetic circuit assembly may further include a first side magnetic guide plate and a second side magnetic guide plate (not shown). The first side magnetic guide plate is located on the side of the first side magnet 620 facing the first diaphragm 100, and the second side magnetic guide plate is located on the side of the second side magnet 630 facing the first diaphragm 100. The shape of the first side magnetic guide plate may be the same as that of the first side magnet 620, and the shape of the second side magnetic guide plate may be the same as that of the second side magnet 630. Taking the first side magnetic guide plate as an example, the first side magnetic guide plate may be plate-shaped, and its dimension along a third direction is larger than its dimension along a second direction. The first side magnet 620 may be fixed to the surface of the first side magnet 620 facing the first diaphragm 100 by means of bonding, snap-fitting, or screw connection. The materials of the first and second side magnetic guide plates may include, but are not limited to, low-carbon steel. In this embodiment of the application, by providing a first side magnetic guide plate and a second side magnetic guide plate on one side of the first side magnet 620 and the second side magnet 630 respectively, the magnetic lines of force of the first side magnet 620 and the second side magnet 630 can be constrained by the first side magnetic guide plate and the second side magnetic guide plate respectively, thereby increasing the magnetic flux intensity at the first magnetic gap 601 and the second magnetic gap 602, and thus improving the vibration intensity of the voice coil 200.

[0083] Similarly, when the side magnet structure includes an annular side magnet, the magnetic circuit assembly may also include an annular magnetic guide plate, which is located on the side of the annular side magnet facing the first diaphragm 100. In this embodiment, by providing an annular magnetic guide plate on one side of the annular side magnet, the magnetic lines of force of the annular side magnet can be constrained by the annular magnetic guide plate, thereby increasing the magnetic flux intensity at the first magnetic gap 601 and the second magnetic gap 602, and thus improving the vibration intensity of the voice coil 200.

[0084] In some embodiments, the sound-generating device may further include a first housing 700, a first folded ring 710, and a second folded ring 720. The first housing 700 has a first receiving cavity. The wall of the first housing 700 has a first opening and a second opening that communicate with the first receiving cavity and are disposed opposite to each other in a first direction. The voice coil 200 and the connecting post 300 are located within the receiving cavity. The first diaphragm 100 is located in the first opening, and the second diaphragm 110 is located in the second opening. The first folded ring 710 surrounds the first diaphragm 100 and is embedded in the first opening, and the second folded ring 720 surrounds the second diaphragm 110 and is embedded in the second opening. As an example, such as Figure 1 and Figure 2As shown, at least a portion of the first folded ring 710 protrudes towards the second folded ring 720 along the first direction, and at least a portion of the second folded ring 720 protrudes towards the first folded ring 710 along the first direction. In this embodiment, by surrounding the first folded ring 710 and the second folded ring 720 around the periphery of the first diaphragm 100 and the second diaphragm 110 respectively, the first folded ring 710 and the second folded ring 720 can support the first diaphragm 100 and the second diaphragm 110 respectively in a direction perpendicular to the first direction. This ensures that the first diaphragm 100 and the second diaphragm 110 can vibrate along their normal direction, i.e., the first direction, improving the noise problem of the sound-generating device. Simultaneously, it allows for a larger permissible amplitude of the first diaphragm 100 and the second diaphragm 110 along the first direction, thereby driving the surrounding air to output a higher sound pressure level.

[0085] In some implementations, such as Figure 3 , Figure 11 and Figure 12 As shown, the sound-generating device may further include a second housing 800, which has a second receiving cavity. The wall of the second housing 800 has a first sound outlet 801 and a second sound outlet 802 communicating with the second receiving cavity. The first housing 800 is located within the second receiving cavity. Along the second direction, the first sound outlet 801 and the second sound outlet 802 are located on opposite sides of the first housing 700, and the first and second directions intersect. As an example, the second housing 800 may include a first sub-housing 810 and a second sub-housing 820 distributed along the first direction. The first sub-housing 810 and the second sub-housing 820 together enclose the second receiving cavity. The first sound outlet 801 is located in the first sub-housing 810, and the second sound outlet 802 is located in the second sub-housing 820.

[0086] Since the first sound outlet 801 and the second sound outlet 802 are located on opposite sides of the first housing 700, when the user wears the sound-generating device, the first sound outlet 801 is closer to the user's ear, and the second sound outlet 802 is located on the side of the second housing 800 furthest from the user's ear. Therefore, when the voice coil 200 is energized with alternating current and vibrates under the influence of a magnetic field, it transfers vibrational energy to both the first diaphragm 100 and the second diaphragm 110 via the connector 400. Simultaneously, the first diaphragm 100 also transfers vibrational energy to the second diaphragm 110 via the connecting post 300. This causes the first and second diaphragms 100 to vibrate synchronously and in the same direction, pushing the surrounding air to produce sound. At this time, the sound-generating device radiates sound both forward and backward. The sound radiated forward travels through the first sound outlet 801 to the user's ear, while the sound radiated backward travels through the second sound outlet 802, thus reducing near-field phase cancellation.

[0087] As an example, the sound output area of ​​the first sound outlet 801 and the sound output area of ​​the second sound outlet 802 can be the same. This arrangement can improve the consistency of the sound radiated forward and backward by the sound-generating device, and at the same time, it can also better cancel out the phase of the sound radiated forward and backward by the sound-generating device in the far field.

[0088] To ensure better phase cancellation of sound radiated forward and backward by the sound-generating device in the far field and reduced phase cancellation in the near field, the first sound outlet 801 is closer to the first diaphragm 100 than the second sound outlet 802 in the first direction. In a plane perpendicular to the second direction, the projections of the first sound outlet 801 and the second sound outlet 802 do not overlap at least partially; in other words, in the third direction, the first sound outlet 801 and the second sound outlet 802 are staggered. Of course, in other embodiments, the projections of the first sound outlet 801 and the second sound outlet 802 may completely overlap in a plane perpendicular to the second direction; this application does not limit this to such cases.

[0089] In addition, this application also provides an electronic device including the aforementioned sound-generating device. The electronic device in this application may include, but is not limited to, devices with sound playback functions such as mobile phones, tablet personal computers, laptop computers, personal digital assistants (PDAs), personal computers, in-vehicle devices, wearable devices, portable music players, radios, televisions, and speakers. Wearable devices may include near-eye display glasses such as AR (Augmented Reality) glasses, VR (Virtual Reality) glasses, and MR (Mixed Reality) glasses, smart bracelets, smartwatches, and smart headphones.

[0090] As an example, the electronic device includes a frame and a first temple and a second temple disposed on both sides of the frame, at least one of the first temple and the second temple being equipped with the aforementioned sound-generating device. As an example, both the first temple and the second temple are rotatably connected to the frame.

[0091] The specific embodiments described above do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A sound producing device, characterized by, The application relates to a loudspeaker device. The loudspeaker device comprises: a vibration assembly comprising a first diaphragm and a second diaphragm arranged opposite to each other in a first direction; a voice coil located between the first diaphragm and the second diaphragm and connected to the first diaphragm; and a connecting column having one end connected to the first diaphragm and the other end connected to the second diaphragm.

2. The sound production device of claim 1, wherein, The connecting column is in a hollow structure.

3. The sound production device of claim 1, wherein, The connecting column comprises: a column body extending in the first direction; a first flange surrounding one end of the column body; and a second flange surrounding the other end of the column body; wherein a surface of the first flange facing away from the second flange is connected to the first diaphragm, and a surface of the second flange facing away from the first flange is connected to the second diaphragm.

4. Sound production device according to any one of claims 1 to 3, wherein The loudspeaker device further comprises a connecting member having one end connected to the voice coil and the other end connected to the second diaphragm.

5. The sound production device of claim 4, wherein, The connecting member comprises: a first connecting part located on one side of the voice coil in a second direction and connected to the voice coil; and a second connecting part located on the side of the voice coil facing the second diaphragm in the first direction and connected to the first connecting part and the second diaphragm, respectively; wherein the first direction intersects the second direction.

6. The sound production device of claim 5, wherein, The voice coil is in a ring shape, and the first connecting part is connected to the inner side wall of the voice coil.

7. The sound production device of claim 5, wherein, The end surface of the second connecting part facing away from the second diaphragm is connected to the voice coil.

8. The sound production device of claim 4, wherein, The voice coil extends in a direction intersecting the first direction, and the number of the connecting members is plural, and the plural connecting members are distributed at intervals in the direction in which the voice coil extends.

9. The sound production device of claim 8, wherein, The loudspeaker device further comprises a support member, and the plural connecting members are connected to the second diaphragm through the support member.

10. The sound production device of claim 4, wherein, The voice coil comprises a first part and a second part arranged opposite to each other in a second direction, and the loudspeaker device further comprises a magnetic circuit assembly; wherein the magnetic circuit assembly comprises: a center magnet having a first avoiding hole through which the connecting column passes; and a side magnet structure having a first magnetic gap and a second magnetic gap between the center magnet, the first magnetic gap being located on one side of the center magnet in the second direction, and the second magnetic gap being located on the other side of the center magnet in the second direction, at least a part of the first part being located in the first magnetic gap, and at least a part of the second part being located in the second magnetic gap.

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