Sound production device and electronic equipment

Abstract

The utility model 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] The present application relates to the technical field of electronic equipment, and in particular to a sound-generating device and an electronic device. Background Art

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

[0003] Currently, how to improve the sound leakage prevention performance of a sound-generating device is one of the technical problems that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] According to the first aspect of the present application, the sound-producing device provided includes a vibration component, a voice coil and a connecting column. The vibration component includes a first diaphragm and a second diaphragm arranged 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 column is connected to the first diaphragm, and the other end is connected to the second diaphragm.

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

[0006] According to one embodiment of the present application, the connecting column includes a column, a first flange and a second flange, the column extends along the first direction, the first flange surrounds one end of the column, the second flange surrounds the other end of the column, 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 the present application, the sound-generating device further includes a connecting member, 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 the present application, the connecting member includes a first connecting portion and a second connecting portion, the first connecting portion is located on one side of the voice coil along the 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 respectively connected to the first connecting portion and the second diaphragm, and the first direction intersects with the second direction.

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

[0010] According to one embodiment of the present application, the end surface of the second connecting portion facing away from the second diaphragm is connected to the voice coil.

[0011] According to one embodiment of the present application, the voice coil extends along a direction intersecting the first direction, and there are multiple connecting members, which are spaced apart along the extending direction of the voice coil.

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

[0013] According to one embodiment of the present application, the voice coil includes a first part and a second part arranged relative to each other in a second direction, and the sound-emitting device also includes a magnetic circuit assembly; the magnetic circuit assembly includes a central magnet and a side magnet structure, the central magnet is provided with a first avoidance hole passing through the connecting column, and a first magnetic gap and a second magnetic gap are provided between the side magnet structure and the central magnet, the first magnetic gap is located on one side of the central magnet along the second direction, and 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 part is located in the first magnetic gap, and at least a portion of the second part is located in the second magnetic gap.

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

[0015] According to one embodiment of the present application, the side magnet structure includes an annular side magnet, which surrounds the periphery of the central magnet and has the first magnetic gap and the second magnetic gap between the annular side magnet and the central magnet.

[0016] According to one embodiment of the present application, the connecting member is connected to at least the surface of the voice coil facing the central magnet, and a side of the central magnet facing the voice coil is provided with an avoidance groove corresponding to the connecting member.

[0017] According to one embodiment of the present application, the magnetic circuit assembly also includes a magnetic circuit support plate, which is located on the side of the central magnet away from the first diaphragm along the first direction, and the central magnet and the side magnet structure are both arranged on the magnetic circuit support plate. The magnetic circuit support plate is provided with a second avoidance hole corresponding to the connecting column.

[0018] According to one embodiment of the present application, the connecting member is connected to at least the surface of the voice coil facing the central magnet, and the magnetic circuit support plate is provided with a third avoidance hole corresponding to the connecting member.

[0019] According to one embodiment of the present 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 center magnet in the second direction, the first side magnet and the center magnet have a first magnetic gap, and the second side magnet and the center magnet have a second magnetic gap; the magnetic circuit support plate includes a plate body and two enclosures, the plate body is arranged opposite to the center magnet along the first direction, the plate body is provided with the first avoidance hole, the two enclosures are respectively located at the two ends of the plate body along the third direction, the first side magnet and the second side magnet are both located between the two enclosures, so as to form a cavity together with the two enclosures to accommodate the voice coil and the center magnet, and the first direction, the second direction and the third direction intersect with each other.

[0020] According to one embodiment of the present application, the sound-emitting device also includes a first shell, a first folding ring and a second folding ring, the first shell has a first accommodating cavity, the wall surface of the first shell is provided with a first opening and a second opening which are connected to the first accommodating cavity and are arranged opposite to each other in the first direction, the voice coil and the connecting column are located in the accommodating cavity, the first diaphragm is located in the first opening, the second diaphragm is located in the second opening, the first folding ring surrounds the first diaphragm and is embedded in the first opening, and the second folding ring surrounds the second diaphragm and is embedded in the second opening.

[0021] According to one embodiment of the present application, the sound-emitting device also includes a second shell, the second shell has a second accommodating cavity, the wall of the second shell is provided with a first sound outlet hole and a second sound outlet hole connected to the second accommodating cavity, the first shell is located in the second accommodating cavity, along the second direction, the first sound outlet hole and the second sound outlet hole are respectively located on both sides of the first shell, and the first direction and the second direction intersect.

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

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

[0024] The sound-emitting device provided in the embodiments of the present application has a voice coil connected to a first diaphragm, and a connecting post is provided between the first and second diaphragms, with the ends of the connecting post 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 also drives 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-emitting device in the embodiments of the present application is a single voice coil + dual diaphragm structure. By providing a connecting post between the first and second diaphragms, not only can a single voice coil drive the two diaphragms, namely the first and second diaphragms, to vibrate and produce sound, thereby reducing costs and simplifying the structure, but also can cause the first and second diaphragms to vibrate in the same direction, thereby ensuring the consistency of the amplitude of the sound radiated forward and backward by the sound-emitting device, and making the phase of the sound radiated forward by the sound-emitting device and the sound radiated backward by the sound-emitting device opposite in the far field, that is, there is a 180° phase difference, which effectively cancels out the opposite phases, thereby significantly improving the sound leakage prevention performance of the sound-emitting device.

[0025] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, purposes and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments made with reference to the following drawings. The drawings are used to better understand the present solution and do not constitute a limitation of the present application.

[0027] In the attached figure:

[0028] Figure 1 is a schematic cross-sectional view of a sound-generating device according to one embodiment of the present application;

[0029] Figure 2 is a schematic cross-sectional view of a sound-generating device according to another embodiment of the present application;

[0030] Figure 3 is a schematic cross-sectional view of a sound-generating device according to yet another embodiment of the present application;

[0031] Figure 4 This is a three-dimensional schematic diagram of one angle of a sound-generating device (excluding the vibration component, connecting column and connecting member) according to one embodiment of the present application;

[0032] Figure 5 This is a perspective schematic diagram of a sound-generating device (excluding the vibration component, connecting column and connecting member) according to an embodiment of the present application from another angle;

[0033] Figure 6This is a perspective schematic diagram of a sound-generating device (excluding the vibration component) according to one embodiment of the present application from one angle;

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

[0035] Figure 8 is a schematic diagram of the assembly of a connecting member and a supporting member according to one embodiment of the present application;

[0036] Figure 9 is a perspective schematic diagram of a central magnet according to one embodiment of the present application;

[0037] Figure 10 is a perspective schematic diagram of a connecting column according to one embodiment of the present application;

[0038] Figure 11 is a perspective schematic diagram of a second housing at one angle according to one embodiment of the present application;

[0039] Figure 12 This is a three-dimensional schematic diagram of the second shell from another angle according to an embodiment of the present application.

[0040] Reference numerals:

[0041] 100, first diaphragm; 110, second diaphragm; 200, voice coil; 210, first part;

[0042] 220, second part; 230, third part; 240, fourth part; 300, connecting column;

[0043] 310, column; 320, first flange; 330, second flange; 400, connector;

[0044] 410, first connecting portion; 420, second connecting portion; 500, supporting member;

[0045] 601, first magnetic gap; 602, second magnetic gap; 610, central magnet;

[0046] 611, first avoidance hole; 612, avoidance groove; 620, first side magnet;

[0047] 630, second side magnet; 640, magnetic circuit support plate; 641, second avoidance hole;

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

[0049] 700, first housing; 710, first fold ring; 720, second fold ring;

[0050] 800, second housing; 801, first sound outlet; 802, second sound outlet;

[0051] 810, first sub-shell; 820, second sub-shell. DETAILED DESCRIPTION

[0052] In the description of the embodiments of the present application, it should be noted that the terms "upper," "lower," "top," "bottom," "inner," "outer," etc., indicating positions or state relationships, are based on the positions or state relationships shown in the accompanying drawings and are intended only to facilitate the description of the embodiments of the present application and to simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific position, be constructed and operate in a specific position, and therefore should not be understood as limiting the embodiments of the present application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

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

[0054] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

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

[0056] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0057] Currently, a sound-generating device typically consists of 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 for the voice coil. When an alternating current flows through the voice coil, the magnetic field causes it to vibrate, which in turn drives the diaphragm to vibrate synchronously, producing sound. The sound-generating device radiates sound both forward and backward, with the forward-radiated sound 180° out of phase with the backward-radiated sound. In the far field, the forward-radiated and backward-radiated sounds are short-circuited and canceled out by the 180° phase difference.

[0058] However, since the existing sound-emitting devices have poor consistency in the sound radiation to the front and rear, that is, the frequency responses of the front and rear sounds are inconsistent, the sound radiated to the front and the sound radiated to the rear of the sound-emitting device have a large difference in the far field, and cannot be well offset in the far field, thereby affecting the sound leakage prevention performance of the sound-emitting device.

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

[0060] Since the voice coil 200 is connected to the first diaphragm 100 in the embodiment of the present application, and a connecting column 300 is provided between the first diaphragm 100 and the second diaphragm 110, and the two ends of the connecting column 300 are respectively connected to the first diaphragm 100 and the second diaphragm 110, when the voice coil 200 drives the first diaphragm 100 to vibrate along the first direction, the first diaphragm 100 will also drive the second diaphragm 110 to vibrate synchronously in the same direction through the connecting column 300, thereby driving the surrounding air to vibrate and produce sound. As can be seen, the sound-generating device in the embodiment of the present application adopts a single voice coil + dual diaphragm structure. By providing a connecting post 300 between the first diaphragm 100 and the second diaphragm 110, not only can the single voice coil 200 drive the two diaphragms, namely the first diaphragm 100 and the second diaphragm 110, to vibrate and produce sound, thus reducing costs and simplifying the structure, but also allowing the first diaphragm 100 and the second diaphragm 110 to 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 by the sound-generating device and the sound radiated backward by the sound-generating device are opposite in phase in the far field, that is, there is a 180° phase difference, effectively canceling each other out in anti-phase superposition, thereby significantly improving the sound leakage prevention performance of the sound-generating device. Furthermore, 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 in the normal direction, i.e., the first direction, of the first diaphragm 100 and the second diaphragm 110 without polarization, thereby achieving vibration of a larger amplitude.

[0061] It should be noted that the vibration direction of the first diaphragm 100 and the second diaphragm 110 is parallel to the first direction, and the first direction is generally parallel to the thickness direction of the first diaphragm 100 and the second diaphragm 110. For example, the first direction may be the z direction in the accompanying drawings, and "forward" in the above text may be the positive direction or the negative direction of z, and "backward" generally refers to the direction opposite to the forward direction. In addition, the voice coil 200 may be fixed to the surface of the first diaphragm 100 facing the second diaphragm 110 by gluing or clamping, but is not limited to. The voice coil 200 may be wound by voice coil wire, and the voice coil wire may be a material with strong plasticity such as enameled wire. The stronger the plasticity of the voice coil wire, the stronger its ability to irreversibly deform, and thus the easier it is to wind and form.

[0062] In some embodiments, as Figure 10 As shown, the connecting post 300 can be a hollow structure. This configuration not only reduces the weight of the connecting post 300, thereby reducing the impact of the connecting post 300 on the amplitude of the first diaphragm 100 and the second diaphragm 110, but also allows the hollow connecting post 300 to have a larger dimension perpendicular to the first direction while maintaining a certain weight, thereby increasing 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 irregularly shaped.

[0063] As an example, Figure 10 As shown, the connecting column 300 includes a column body 310 and a first flange 320 and a second flange 330 connected to the column body 310. The column body 310 extends along a first direction, the first flange 320 surrounds one end of the column body 310, and the second flange 330 surrounds the other end of the column 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 column body 310, or can be fixed to the column body 310 by bonding, threading, or clamping.

[0064] Considering that the thickness of the first diaphragm 100 and the second diaphragm 110 is generally thin, in order to make the vibration forms of the first diaphragm 100 and the second diaphragm 110 more consistent, as shown in FIG. Figure 2 As shown, the sound-generating device further includes a connector 400, one end of which is connected to the voice coil 200 and the other end to the second diaphragm 110. In this case, along a first direction, one side of the voice coil 200 is connected to the first diaphragm 100, while the other side of the voice coil 200 is connected to the second diaphragm 110 via the connector 400. As a result, the voice coil 200 transmits vibration energy to the first diaphragm 100 while also transmitting vibration energy to the second diaphragm 110 via the connector 400. Simultaneously, the first diaphragm 100 also transmits vibration energy to the second diaphragm 110 via the connecting post 300. With the combined assistance of the connecting post 300 and the connector 400, the first and second diaphragms 100, 110, and 110 can vibrate synchronously and in the same direction, maintaining consistent vibration patterns. In other words, the first and second diaphragms 100, 110, have identical amplitudes but opposite phases.

[0065] In order to increase the contact area between the connector 400 and the voice coil 200, thereby improving the connection strength between the connector 400 and the voice coil 200, and preventing the connector 400 from being separated from the voice coil 200 due to insufficient connection strength during the vibration of the voice coil 200, the connector 400 can be connected to the side wall 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, bonding, screws, or clamping. As an example, Figure 2 and Figure 8As shown, the connector 400 includes a first connector portion 410 and a second connector portion 420. The first connector portion 410 is located on one side of the voice coil 200 along the second direction. The surface of the first connector portion 410 facing the voice coil 200 is connected to the voice coil 200. The second connector portion 420 is located on the side of the voice coil 200 facing the second diaphragm 110 along the first direction. The second connector portion 420 is connected to the first connector portion 410 and the second diaphragm 110, respectively. The first direction intersects the second direction. For example, the sidewall of one end of the second connector portion 420 is connected to a portion of the sidewall of the first connector portion 410 facing the center magnet 610, and the other end of the second connector portion 420 is connected to the second diaphragm 110. Because 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 surface 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 sidewall of the voice coil 200 extending along the first direction has a larger area. This significantly increases the contact area between the connector 400 and the voice coil 200, thereby improving the connection strength between the connector 400 and the voice coil 200. It should be noted that the intersection of the first and second directions can generally be understood as the first and second directions forming an angle. For example, the first and second directions are perpendicular or approximately perpendicular to each other. As an example, in this embodiment, the first direction can be the z-direction in the accompanying drawings, and the second direction can be the x-direction in the accompanying drawings. When the first and second directions are perpendicular, the projection of the connector 400 on a plane parallel to the first and second directions is generally Z-shaped.

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

[0067] To further increase the contact area between the connector 400 and the voice coil 200, and thereby enhance the connection strength between the connector 400 and the voice coil 200, the connector 400 can be connected not only to the sidewall of the voice coil 200 extending along the first direction, but also to the end surface of the voice coil 200, i.e., the surface of the voice coil 200 facing away from the first diaphragm 100. For example, the end surface 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 connector 400 in the first direction.

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

[0069] In some embodiments, the sound-generating device may further include a support member 500, through which the plurality of connectors 400 are connected to the second diaphragm 110. That is, one end of the connector 400 is connected to the voice coil 200, the other end of the connector 400 is connected to the support member 500, and the side of the support member 500 facing away from the connector 400 is connected to the second diaphragm 110. For example, if the voice coil 200 is annular and the plurality of 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 being disposed opposite each other in the first direction.

[0070] like Figure 1 and Figure 9 As shown, the sound-generating device may also include a magnetic circuit assembly, which is located between the first diaphragm 100 and the second diaphragm 110. The magnetic circuit assembly is used to provide a magnetic field to the voice coil 200, so that the voice coil 200 vibrates under the action of the magnetic field when an alternating current flows into it. As an example, the magnetic circuit assembly includes a central magnet 610 and a side magnet structure. The central magnet 610 is provided with a first avoidance hole 611 through which the connecting column 300 is passed. A first magnetic gap 601 and a second magnetic gap 602 are provided between the side magnet structure and the central magnet 610. The first magnetic gap 601 is located on one side of the central magnet 610 along the 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 in the first magnetic gap 601 and the second magnetic gap 602. For example, in combination 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 the second direction. At least a portion of the first portion 210 is located in the first magnetic gap 601 , and at least a portion of the second portion 220 is located in the second magnetic gap 602 .

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

[0072] In the embodiment of the present application, the central magnet 610, the first side magnet 620, and the second side magnet 630 are all magnetized along a first direction, and the magnetization direction of the first side magnet 620 and the magnetization direction of 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 north pole, and the magnetic pole of the central magnet 610 facing away from the first diaphragm 100 is the south pole. The magnetic poles of the first side magnet 620 and the second side magnet 630 facing the first diaphragm 100 are both south poles, and the magnetic poles of the first side magnet 620 and the second side magnet 630 facing away from the first diaphragm 100 are north poles. Of course, the magnetic pole of the central magnet 610 facing the first diaphragm 100 can also be the south pole, and the magnetic poles of the first side magnet 620 and the second side magnet 630 facing the first diaphragm 100 can also both be north 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 a connecting column 300 is connected between the first diaphragm 100 and the second diaphragm 110, and the side of the voice coil 200 facing away from the first diaphragm 100 is connected to the second diaphragm 110 through the connecting member 400, when the voice coil 200 vibrates, it transfers vibration energy to the first diaphragm 100, and also transfers vibration energy to the second diaphragm 110 through the connecting member 400. At the same time, the first diaphragm 100 also transfers vibration energy to the second diaphragm 110 through the connecting column 300. Therefore, with the joint assistance of the connecting column 300 and the connecting member 400, the first diaphragm 100 and the second diaphragm 110 can vibrate synchronously in the same direction, so that the vibration forms of the first diaphragm 100 and the second diaphragm 110 can be consistent. In other words, the amplitudes of the first diaphragm 100 and the second diaphragm 110 are consistent but the phases are opposite. As a result, the sound-emitting device radiates sound to the front and rear at the same time, and the amplitude of the sound radiated forward and backward by the sound-emitting device is the same, but the sound radiated forward by the sound-emitting device and the sound radiated backward are opposite in phase in the far field, that is, there is a 180° phase difference, which can effectively cancel each other out in reverse phase, thereby significantly improving the sound leakage prevention performance of the sound-emitting device.

[0073] It should be noted that in the embodiment of the present application, there may be multiple voice coils 200, with the multiple voice coils 200 spaced apart in the second direction. In this case, there may be multiple central magnets 610, and at least one of the first side magnets 620 and the second side magnets 630 may be spaced apart. The first side magnets 620 and the second side magnets 630 may be alternately spaced in the second direction, with the central magnet 610 positioned between adjacent first side magnets 620 and second side magnets 630. For example, the sound-emitting 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 the second direction, the second side magnet 630 is located between the two first side magnets 620, one of the central magnets 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, there is a first magnetic gap 601 between the central magnet 610 and the adjacent first side magnet 620, and there is a second magnetic gap 602 between the central magnet 610 and the second side magnet 630.

[0074] In the embodiments of the present application, the material of the core magnet 610 may be, but is not limited to, a magnet or magnetic steel. The center magnet 610 may be a plate-shaped structure. The size of the center magnet 610 along the third direction is greater than its size along the second direction. The first direction, the second direction, and the third direction intersect with each other. Similarly, the material of the first side magnet 620 and the second side magnet 630 may be, but is not limited to, a magnet or magnetic steel. The first side magnet 620 and the second side magnet 630 may also be plate-shaped. Taking the first side magnet 620 as an example, the size of the first side magnet 620 along the third direction is greater than its size along the second direction. The size of the first side magnet 620 along the second direction may be smaller than the size of the center magnet 610 along the second direction. In addition, the first side magnet 620 and the second side magnet 630 may be symmetrical or asymmetrical about the center magnet 610, and this is not limited in this application. It should be noted that the intersection of the first direction, the second direction, and the third direction may generally be understood as an angle between the first direction and the second direction, between the second direction and the third direction, and between the first direction and the third direction. 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 the present application, the first direction may be the z direction in the drawings, the second direction may be the x direction in the drawings, and the third direction may also be the y direction in the drawings.

[0075] In some other embodiments, the side magnet structure includes an annular side magnet (not shown), which surrounds the periphery of the central magnet 610, and defines a first magnetic gap 601 and a second magnetic gap 602 between the annular side magnet and the central magnet 610. The first magnetic gap 601 and the second magnetic gap 602 are respectively located on either side of the central magnet 610 in the second direction. The central magnet 610 and the annular side magnet are both magnetized along the first direction, and the magnetization direction of the central magnet 610 is 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 north pole, and the magnetic pole of the central magnet 610 facing away from the first diaphragm 100 is the south pole. The magnetic pole of the annular side magnet facing the first diaphragm 100 is the south pole, and the magnetic pole of the annular side magnet facing away from the first diaphragm 100 is the north pole. Of course, the magnetic pole of the central magnet 610 facing the first diaphragm 100 may also be an S pole, and the magnetic pole of the annular edge magnet facing the first diaphragm 100 may also be an N pole.

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

[0077] In some embodiments, the connector 400 is connected to at least the surface of the voice coil 200 facing the central magnet 610. In order to reduce the size of the entire sound-generating device in the second direction and achieve miniaturization, such as Figure 2 and Figure 9 As shown, a side of the central magnet 610 facing the voice coil 200 may be provided with an escape groove 612 corresponding to the connector 400. Thus, the portion of the connector 400 connected to the surface of the voice coil 200 facing the central magnet 610 may be located within the escape groove 612. For example, in the case where the connector 400 includes a first connecting portion 410 and a second connecting portion 420, the first connecting portion 410 is connected to the surface of the voice coil 200 facing the central magnet 610. At least a portion of the first connecting portion 410 in the second direction is located within the escape groove 612. In other words, on a plane perpendicular to the third direction, the projection of the first connecting portion 410 and the projection of the escape 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, which is located on a side of the center magnet 610 away from the first diaphragm 100 along the first direction. The center magnet 610 and the side magnet structure are both disposed on the magnetic circuit support plate 640. The voice coil 200 is located between the first diaphragm 100 and the magnetic circuit support plate 640 in the first direction. The magnetic circuit support plate 640 defines a second avoidance 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 avoidance hole 611 and the second avoidance hole 641 in sequence before being connected to the second diaphragm 110. The magnetic circuit support plate 640 may be connected to the center magnet 610 and the side magnet structure respectively by, but is not limited to, bonding, clamping, or screwing. The material of the magnetic circuit support plate 640 may be, but is not limited to, mild steel or plastic.

[0079] By arranging a magnetic circuit support plate 640 on the same side of the central magnet 610 and the side magnet structure, the embodiment of the present application can use the magnetic circuit support plate 640 to 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 flow 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 from the sound-generating device.

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

[0081] In some embodiments, the magnetic circuit assembly may further include a central magnetic conductive plate (not shown), which is located on the side of the central magnet 610 facing the first diaphragm 100. The shape of the central magnetic conductive plate may be adapted to the shape of the central magnet 610. In other words, the shape of the central magnetic conductive plate may be the same as the shape of the central magnet 610. For example, the central magnetic conductive plate may be plate-shaped, and the size of the central magnetic conductive plate along the third direction may be greater than its size along the second direction. In addition, the central magnetic conductive plate may be fixed to the surface of the central magnet 610 facing the first diaphragm 100 by, but not limited to, bonding, clamping, or screw connection. The material of the central magnetic conductive plate may be, but not limited to, low-carbon steel. In the embodiment of the present application, by arranging the central magnetic conductive plate on one side of the central magnet 610, the magnetic lines of force of the central magnet 610 can be constrained by means of the central magnetic conductive plate, thereby increasing the magnetic flow intensity at the first magnetic gap 601 and the second magnetic gap 602, thereby 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 conductive plate and a second side magnetic conductive plate (not shown). The first side magnetic conductive plate is located on the side of the first side magnet 620 facing the first diaphragm 100, and the second side magnetic conductive plate is located on the side of the second side magnet 630 facing the first diaphragm 100. The shape of the first side magnetic conductive plate can be the same as that of the first side magnet 620, and the shape of the second side magnetic conductive plate can be the same as that of the second side magnet 630. Taking the first side magnetic conductive plate as an example, the first side magnetic conductive plate can be plate-shaped, with the dimension of the first side magnetic conductive plate along the third direction being greater than the dimension along the second direction. The first side magnet 620 can be secured to the surface of the first side magnet 620 facing the first diaphragm 100 by, but not limited to, bonding, clamping, or screwing. The material of the first side magnetic conductive plate and the second side magnetic conductive plate can be, but not limited to, low-carbon steel. In the embodiment of the present application, by respectively arranging a first side magnetic conductive plate and a second side magnetic conductive plate on one side of the first side magnet 620 and the second side magnet 630, the first side magnetic conductive plate and the second side magnetic conductive plate can be used to respectively constrain the magnetic lines of force of the first side magnet 620 and the second side magnet 630, thereby increasing the magnetic flow intensity at the first magnetic gap 601 and the second magnetic gap 602, thereby 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 further include an annular magnetic conductive plate, which is located on the side of the annular side magnet facing the first diaphragm 100. In the embodiment of the present application, by providing the annular magnetic conductive plate on one side of the annular side magnet, the annular magnetic conductive plate can be used to constrain the magnetic lines of force of the annular side magnet, thereby increasing the magnetic flow intensity at the first magnetic gap 601 and the second magnetic gap 602, thereby improving the vibration intensity of the voice coil 200.

[0084] In some embodiments, the sound-emitting device may further include a first shell 700, a first fold ring 710, and a second fold ring 720. The first shell 700 has a first accommodating cavity. The wall surface of the first shell 700 is provided with a first opening and a second opening that are connected to the first accommodating cavity and are arranged opposite to each other in a first direction. The voice coil 200 and the connecting column 300 are located in the accommodating cavity. The first diaphragm 100 is located in the first opening. The second diaphragm 110 is located in the second opening. The first fold ring 710 surrounds the first diaphragm 100 and is embedded in the first opening. The second fold ring 720 surrounds the second diaphragm 110 and is embedded in the second opening. As an example, Figure 1 and Figure 2As shown, at least a portion of the first fold 710 bulges along the first direction toward the second fold 720, and at least a portion of the second fold 720 bulges along the first direction toward the first fold 710. In the embodiment of the present application, by surrounding the first fold 710 and the second fold 720 around the periphery of the first diaphragm 100 and the second diaphragm 110, respectively, the first fold 710 and the second fold 720 can support the first diaphragm 100 and the second diaphragm 110 in a direction perpendicular to the first direction, thereby ensuring that the first diaphragm 100 and the second diaphragm 110 can vibrate along their normal direction, i.e., the first direction, thereby improving the noise problem of the sound-generating device. At the same time, the allowable amplitude of the first diaphragm 100 and the second diaphragm 110 along the first direction can be increased, thereby promoting the output of a higher sound pressure level in the surrounding air.

[0085] In some embodiments, as Figure 3 、 Figure 11 and Figure 12 As shown, the sound-emitting device may further include a second housing 800, the second housing 800 having a second accommodating cavity. The wall of the second housing 800 is provided with a first sound outlet 801 and a second sound outlet 802 communicating with the second accommodating cavity. The first housing 700 is located within the second accommodating cavity. Along the second direction, the first sound outlet 801 and the second sound outlet 802 are respectively 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 accommodating 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 respectively located on both sides of the first shell 700, when the user wears the sound-emitting device, the first sound outlet 801 is close to the user's ear, and the second sound outlet 802 is located on the side of the second shell 800 away from the user's ear. Therefore, when the voice coil 200 is subjected to an alternating current and vibrates under the action of the magnetic field, the voice coil 200 transfers the vibration energy to the first diaphragm 100 while also transferring the vibration energy to the second diaphragm 110 through the connecting member 400. At the same time, the first diaphragm 100 also transfers the vibration energy to the second diaphragm 110 through the connecting column 300, thereby causing the first diaphragm 100 and the second diaphragm 110 to vibrate synchronously in the same direction and push the surrounding air to produce sound. At this time, the sound-emitting device radiates sound both forward and backward. The sound radiated forward by the sound-emitting device is transmitted forward to the user's ear through the first sound outlet 801, and the sound radiated backward by the sound-emitting device is transmitted backward through the second sound outlet 802, thereby reducing the anti-phase cancellation in the near field.

[0087] As an example, the sound output area of ​​the first sound output hole 801 can be the same as the sound output area of ​​the second sound output hole 802. This configuration can improve the consistency of the sound radiated forward and backward by the sound emitting device, and can also better cancel out the sound radiated forward and backward by the sound emitting device in the far field.

[0088] In order to achieve better phase cancellation of the sound radiated forward and backward by the sound-emitting device in the far field and to reduce 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. On a plane perpendicular to the second direction, the projection of the first sound outlet 801 and the projection of the second sound outlet 802 at least partially do not overlap. In other words, in the third direction, the first sound outlet 801 and the second sound outlet 802 are staggered front to back. Of course, in other embodiments, on a plane perpendicular to the second direction, the projection of the first sound outlet 801 and the projection of the second sound outlet 802 may also completely overlap, and this application does not limit this.

[0089] In addition, an embodiment of the present application further provides an electronic device, which includes the above-mentioned sound-generating device. The electronic device in the embodiment of the present application may include, but is not limited to, a mobile phone, a tablet personal computer, a notebook computer, a laptop computer, a personal digital assistant (PDA), a personal computer, a vehicle-mounted device, a wearable device, a walkman, a radio, a television, a speaker, and other devices with a sound playback function. Among them, the wearable device may include AR (Augmented Reality) glasses, VR (Virtual Reality) glasses, MR (Mixed Reality) glasses and other near-eye display glasses, smart bracelets, smart watches, 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, wherein at least one of the first temple and the second temple is equipped with the above-mentioned sound-generating device. As an example, the first temple and the second temple are both rotatably connected to the frame.

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

Claims

1. A sound-generating device, characterized in that: include: The vibration assembly includes a first vibration membrane and a second vibration membrane 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; as well as A connecting post has one end connected to the first diaphragm and the other end connected to the second diaphragm.

2. The sound-generating device according to claim 1, wherein: The connecting column is a hollow structure.

3. The sound-generating device according to claim 1, characterized in that: The connecting column comprises: a column extending along the first direction; a first flange surrounding one end of the column; and a second flange surrounding the other end of the column; 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.

4. The sound-generating device according to any one of claims 1 to 3, characterized in that: The sound-generating device further includes a connecting member, one end of which is connected to the voice coil, and the other end of which is connected to the second diaphragm.

5. The sound-generating device according to claim 4, characterized in that: The connecting piece includes: a first connecting portion, located at one side of the voice coil along the second direction and connected to the voice coil; and a second connecting portion, located along the first direction on a side of the voice coil facing the second diaphragm, and connected to the first connecting portion and the second diaphragm respectively; The first direction intersects with the second direction.

6. The sound-generating device according to claim 5, characterized in that: The voice coil is ring-shaped, and the first connecting portion is connected to the inner wall of the voice coil.

7. The sound-generating device according to claim 5, characterized in that: An end surface of the second connecting portion facing away from the second diaphragm is connected to the voice coil.

8. The sound-generating device according to claim 4, characterized in that: The voice coil extends along a direction intersecting the first direction. There are a plurality of connecting members, and the connecting members are spaced apart along the extending direction of the voice coil.

9. The sound-generating device according to claim 8, characterized in that: The sound-generating device further includes a supporting member, and the plurality of connecting members are connected to the second diaphragm via the supporting member.

10. The sound-generating device according to claim 4, characterized in that: The voice coil includes a first portion and a second portion that are arranged opposite to each other in a second direction, and the sound generating device further includes a magnetic circuit assembly; Wherein, the magnetic circuit component includes: The central magnet is provided with a first avoidance hole through which the connecting column passes; and The side magnet structure has a first magnetic gap and a second magnetic gap between it and the central magnet, 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 part is located in the first magnetic gap, and at least a portion of the second part is located in the second magnetic gap.

11. The sound generating device according to claim 10, characterized in that: The edge magnet structure comprises: a first side magnet located on one side of the central magnet along the second direction, with the first magnetic gap being defined between the first side magnet and the central magnet; and The second side magnet is located on the other side of the central magnet along the second direction, and the second magnetic gap is defined between the second side magnet and the central magnet.

12. The sound generating device according to claim 10, characterized in that: The edge magnet structure comprises: The annular edge magnet surrounds the periphery of the central magnet and has the first magnetic gap and the second magnetic gap between the annular edge magnet and the central magnet.

13. The sound generating device according to claim 10, characterized in that: The connecting member is connected to at least a surface of the voice coil facing the central magnet, and a side of the central magnet facing the voice coil is provided with an avoidance groove corresponding to the connecting member.

14. The sound generating device according to claim 10, wherein: The magnetic circuit assembly also includes a magnetic circuit support plate, which is located on the side of the central magnet away from the first diaphragm along the first direction. The central magnet and the side magnet structure are both arranged on the magnetic circuit support plate, and the magnetic circuit support plate is provided with a second avoidance hole corresponding to the connecting column.

15. The sound generating device according to claim 14, characterized in that: The connecting member is connected to at least a surface of the voice coil facing the central magnet, and the magnetic circuit support plate is provided with a third avoidance hole corresponding to the connecting member.

16. The sound generating device according to claim 14, characterized in that The side magnet structure includes a first side magnet and a second side magnet, wherein the first side magnet and the second side magnet are respectively located on both sides of the central magnet in the second direction, a first magnetic gap is defined between the first side magnet and the central magnet, and a second magnetic gap is defined between the second side magnet and the central magnet; Wherein, the magnetic circuit support plate includes: a plate body, arranged opposite to the central magnet along the first direction, the plate body being provided with the first avoidance hole; and Two enclosure plates, respectively located at two ends of the plate body along the third direction; The first side magnet and the second side magnet are both located between the two enclosures to form a cavity together with the two enclosures to accommodate the voice coil and the center magnet, and the first direction, the second direction and the third direction intersect with each other.

17. The sound-generating device according to any one of claims 1 to 3, characterized in that: The sound-generating device further comprises: A first housing having a first accommodating cavity, wherein a wall surface of the first housing has a first opening and a second opening communicating with the first accommodating cavity and arranged opposite to each other in the first direction, the voice coil and the connecting post being located in the accommodating cavity, the first diaphragm being located in the first opening, and the second diaphragm being located in the second opening; a first fold ring surrounding the first diaphragm and embedded in the first opening; and The second fold ring surrounds the second diaphragm and is embedded in the second opening.

18. The sound generating device according to claim 17, characterized in that: The sound-generating device further comprises: The second shell has a second accommodating cavity, and the wall of the second shell is provided with a first sound outlet hole and a second sound outlet hole connected to the second accommodating cavity. The first shell is located in the second accommodating cavity. Along the second direction, the first sound outlet hole and the second sound outlet hole are respectively located on both sides of the first shell, and the first direction and the second direction intersect.

19. The sound generating device according to claim 18, wherein: In the first direction, the first sound outlet hole is closer to the first diaphragm than the second sound outlet hole.

20. An electronic device, characterized in that: Comprising the sound-generating device according to any one of claims 1 to 19.

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