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 magnetic circuit system, the vibration assembly comprises a first vibrating diaphragm and a second vibrating diaphragm which are arranged at an interval in a first direction; the magnetic circuit system comprises a first magnetic gap and a second magnetic gap; the voice coil comprises a first part and a second part, the first part is located in the first magnetic gap and connected with the first vibrating diaphragm, the second part is located in the second magnetic gap and connected with the second vibrating diaphragm, and the vibration direction of the first part driven by the magnetic circuit system is the same as the vibration direction of the second part driven by the magnetic circuit system.

Description

Technical Field

[0001] The present application relates to the technical field of electronic products, 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-generating device is an indispensable component, and the performance of the sound-generating device directly affects the user experience of these electronic devices.

[0003] Sound-emitting devices can include single-sided and double-sided sound-emitting devices. Double-sided sound-emitting devices offer higher sound pressure levels than single-sided devices and can reduce vibration when the device is in operation. However, existing double-sided sound-emitting devices radiate sound inconsistently, both forward and backward, and are less effective at preventing sound leakage. Utility Model Content

[0004] According to a first aspect of the present application, a sound-generating device is provided. The sound-generating device includes a vibration assembly, a magnetic circuit system, and a voice coil. The vibration assembly includes a first diaphragm and a second diaphragm spaced apart in a first direction. The magnetic circuit system includes a first magnetic gap and a second magnetic gap. The voice coil includes a first portion and a second portion, the first portion being located in the first magnetic gap and connected to the first diaphragm, and the second portion being located in the second magnetic gap and connected to the second diaphragm. The first portion vibrates in the same direction as the second portion when driven by the magnetic circuit system.

[0005] According to an exemplary embodiment of the present application, there are a plurality of voice coils, and the plurality of voice coils are spaced apart in a second direction intersecting the first direction.

[0006] According to an exemplary embodiment of the present application, the magnetic circuit system has multiple first magnetic gaps and multiple second magnetic gaps, the first parts of the multiple voice coils are respectively located in the multiple first magnetic gaps, and the second parts of the multiple voice coils are respectively located in the multiple second magnetic gaps.

[0007] According to an exemplary embodiment of the present application, the first portions of the plurality of voice coils are subjected to the same Ampere force in the first magnetic gap, and the second portions of the plurality of voice coils are subjected to the same Ampere force in the second magnetic gap.

[0008] According to an exemplary embodiment of the present application, the direction of the Ampere force applied to the first portion of the voice coil in the first magnetic gap is the same as the direction of the Ampere force applied to the second portion of the voice coil in the second magnetic gap.

[0009] According to an exemplary embodiment of the present application, a magnetic circuit system includes a first central magnet, a second central magnet, a first side magnet, and a second side magnet. The first central magnet and the second central magnet are located between the first diaphragm and the second diaphragm and are spaced apart in a first direction. The first side magnet and the second side magnet are located on opposite sides of the first central magnet and the second central magnet along a second direction, respectively. A first magnetic gap is formed between the first side magnet, the second side magnet, and the first central magnet, respectively, and a second magnetic gap is formed between the first side magnet, the second side magnet, and the second central magnet, respectively.

[0010] According to an exemplary embodiment of the present application, each of the first side magnet and the second side magnet has a first end proximate to the first central magnet and a second end proximate to the second central magnet, the first end having a first magnetic pole and the second end having a second magnetic pole, the first magnetic pole having a magnetic property opposite to the second magnetic pole. The magnetic pole of the first central magnet proximate to the first side magnet has a magnetic property opposite to the first magnetic pole of the first side magnet, and the magnetic pole of the second central magnet proximate to the first side magnet has a magnetic property opposite to the second magnetic pole of the first side magnet. The magnetic pole of the first central magnet proximate to the second side magnet has a magnetic property opposite to the first magnetic pole of the second side magnet, and the magnetic pole of the second central magnet proximate to the second side magnet has a magnetic property opposite to the second magnetic pole of the second side magnet.

[0011] According to an exemplary embodiment of the present application, the first magnetic poles of the first side magnet and the second magnetic poles have opposite magnetic properties, and the second magnetic poles have opposite magnetic properties.

[0012] According to an exemplary embodiment of the present application, in the second direction, there are multiple magnetic circuit systems, and the first poles of the first side magnets of two adjacent magnetic circuit systems are opposite in magnetism, and the first poles of the second side magnets of two adjacent magnetic circuit systems are opposite in magnetism.

[0013] According to an exemplary embodiment of the present application, there are multiple first central magnets, each of which is positioned between the first side magnet and the second side magnet and spaced apart in the second direction. There are multiple second central magnets, each of which is positioned between the first side magnet and the second side magnet and spaced apart in the second direction. A first magnetic gap is formed between two adjacent first central magnets, and a second magnetic gap is formed between two adjacent second central magnets.

[0014] According to an exemplary embodiment of the present application, the first central magnet and the second central magnet have third and fourth ends disposed opposite each other in the second direction. The magnetic poles at the third ends of the plurality of first central magnets have the same magnetic properties, and the magnetic poles at the fourth ends have the same magnetic properties. The magnetic poles at the third ends of the plurality of second central magnets have the same magnetic properties, and the magnetic poles at the fourth ends have the same magnetic properties.

[0015] According to an exemplary embodiment of the present application, there are two voice coils. The first portion of one voice coil is located between the first side magnet and the first center magnet, and the second portion is located between the first side magnet and the second center magnet. The first portion of the other voice coil is located between the second side magnet and the first center magnet, and the second portion is located between the second side magnet and the second center magnet.

[0016] According to an exemplary embodiment of the present application, in the third direction, the number of the magnetic circuit systems is plural, and the plurality of magnetic circuit systems are spaced apart along the third direction, wherein the third direction intersects the first direction and the second direction.

[0017] According to an exemplary embodiment of the present application, the first magnetic poles of the first side magnets of the plurality of magnetic circuit systems in the third direction have the same magnetic properties, and the first magnetic poles of the second side magnets have the same magnetic properties.

[0018] According to an exemplary embodiment of the present application, the first central magnets of the plurality of magnetic circuit systems in the third direction are arranged at intervals, the second central magnets are arranged at intervals, the first side magnets are arranged at intervals, and the second side magnets are arranged at intervals.

[0019] According to an exemplary embodiment of the present application, the magnetic circuit system further includes a magnetic circuit support plate, which is disposed between the first central magnet and the second central magnet, and is a non-magnetic conductive plate.

[0020] According to an exemplary embodiment of the present application, the voice coil is in a ring shape. The sound generating device further includes a voice coil support plate, which is disposed in the cavity defined by the voice coil.

[0021] According to an exemplary embodiment of the present application, the sound generating device further includes a first fold ring, wherein one end of the first fold ring in the second direction is connected to the voice coil support plate, and the other end is connected to the magnetic circuit support plate.

[0022] According to an exemplary embodiment of the present application, the voice coil support plate is provided with an opening extending through the voice coil support plate in the second direction, and the magnetic circuit support plate is provided with a groove corresponding to the opening. One end of the first fold in the second direction is embedded in the opening, and the other end is embedded in the groove.

[0023] According to an exemplary embodiment of the present application, the sound-generating device further includes a first housing, a second fold, and a third fold. The second fold is used to connect the first diaphragm to the first housing. The third fold is used to connect the second diaphragm to the first housing.

[0024] According to an exemplary embodiment of the present application, the sound-emitting device further includes a second housing, the second housing including a first cover plate, a second cover plate, a third cover plate, and a fourth cover plate, wherein the third cover plate is used to connect the first cover plate and the second cover plate, and the fourth cover plate is used to connect the first cover plate and the second cover plate. The first cover plate and the first diaphragm define a first cavity. The second cover plate and the second diaphragm define a second cavity. The third cover plate is provided with a first sound outlet hole, which is connected to the first cavity. The fourth cover plate is provided with a second sound outlet hole, which is connected to the second cavity.

[0025] According to an exemplary embodiment of the present application, an area of ​​the first sound outlet hole is the same as an area of ​​the second sound outlet hole.

[0026] According to an exemplary embodiment of the present application, the distance between the first cover plate and the first diaphragm is the same as the distance between the second cover plate and the second diaphragm.

[0027] According to an exemplary embodiment of the present application, the sound-generating device further includes a first coupling member and a second coupling member. The first coupling member is disposed on the first portion of the voice coil and is used to connect the first portion to the first diaphragm. The second coupling member is disposed on the second portion of the voice coil and is used to connect the second portion to the second diaphragm.

[0028] A second aspect of the present application provides an electronic device, which includes the sound-generating device as described in the first aspect of the present application.

[0029] In some embodiments of the present application, the vibration assembly includes a first diaphragm and a second diaphragm, the first part of the voice coil is located in the first magnetic gap of the magnetic circuit system and is connected to the first diaphragm, and the second part of the voice coil is located in the second magnetic gap of the magnetic circuit system and is connected to the second diaphragm. Under the action of the magnetic circuit system, the first part and the second part of the voice coil vibrate in the same direction, thereby driving the first diaphragm and the second diaphragm to vibrate in the same direction, ensuring the consistency of the sound radiated forward and backward by the sound-emitting device, and improving the sound leakage prevention effect of the sound-emitting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Other features, objectives, and advantages of the present invention will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings, in which:

[0031] Figure 1 shows a schematic structural diagram of a sound-generating device according to an exemplary embodiment of the present application;

[0032] Figure 2 shows a schematic structural diagram of a sound-generating device according to an exemplary embodiment of the present application;

[0033] Figure 3 Shown Figure 2 A top view of a sound-generating device;

[0034] Figure 4 Shown Figure 2 A front view of a sound-generating device;

[0035] Figure 5 shows a schematic structural diagram of a voice coil according to an exemplary embodiment of the present application;

[0036] Figure 6 shows a schematic structural diagram of a sound-generating device according to an exemplary embodiment of the present application;

[0037] Figure 7 Shown Figure 6 Schematic diagram of the cross section aa of the sound-generating device;

[0038] Figure 8 shows a schematic diagram of a magnetic circuit system according to an exemplary embodiment of the present application;

[0039] Figure 9 shows a schematic diagram of a magnetic circuit system according to an exemplary embodiment of the present application;

[0040] Figure 10 shows a schematic diagram of a magnetic circuit system according to an exemplary embodiment of the present application;

[0041] Figure 11 shows a schematic diagram of a magnetic circuit system according to an exemplary embodiment of the present application;

[0042] Figure 12 Shown Figure 6 bb cross-sectional diagram of the sound-generating device;

[0043] Figure 13 Shown Figure 6 cc cross-sectional diagram of the sound-generating device;

[0044] Figure 14 shows a schematic structural diagram of a sound-generating device according to an exemplary embodiment of the present application;

[0045] Figure 15 shows a schematic structural diagram of a sound-generating device according to an exemplary embodiment of the present application;

[0046] Figure 16 Shown Figure 14 DD cross-sectional diagram; and

[0047] Figure 17 A schematic structural diagram of an electronic device according to an exemplary embodiment of the present application is shown. DETAILED DESCRIPTION

[0048] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0049] It should be noted that in this specification, the expressions first, second, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teachings of this application, the first diaphragm discussed below can be referred to as the second diaphragm.

[0050] In the drawings, the thickness, size, and shape of various components may be slightly exaggerated for ease of explanation. The drawings are for illustration only and are not drawn strictly to scale.

[0051] It should also be understood that the terms "comprising," "including," "having," and / or "provided with," when used in this specification, indicate the presence of stated features, elements, and / or components, but do not preclude the presence of one or more other features, elements, components, and / or combinations thereof. Additionally, the term "exemplarily" is intended to refer to an example or illustration.

[0052] Unless otherwise defined, all terms (including technical and scientific terms) used in this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be understood to have the same meaning as they have in the context of the relevant technology and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0053] 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.

[0054] It should be noted that, hereinafter, the first direction may be referred to as the Z direction, the second direction may be referred to as the Y direction, and the third direction may be referred to as the X direction. The X direction, Y direction, and Z direction in each figure show the spatial relationship of the various components in the sound-emitting device. For example, the Z direction is the height direction of the sound-emitting device, and the X direction and the Y direction are two directions that intersect (for example, are perpendicular) with each other on a plane that intersects (for example, is perpendicular) to the height direction. In addition, the X direction, Y direction, and Z direction in each figure include not only the direction indicated by the arrow, but also the direction away from the arrow. In other words, the arrows in the X direction, Y direction, and Z direction do not have a restrictive meaning. The same concept will be used throughout this application to describe the spatial relationship of the various components in the sound-emitting device.

[0055] The sound-generating device may include two diaphragms, a voice coil, and a magnetic circuit system. When an alternating audio current is applied to the voice coil, the magnetic circuit system induces an alternating force, causing the voice coil to vibrate, repeatedly pushing the surrounding air and producing sound. When the sound-generating device is operating, it 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 cancel each other out due to the 180° phase difference.

[0056] However, the existing sound-emitting devices have poor consistency in radiating sound forward and backward. The sound radiated forward and backward by the sound-emitting devices have large differences in the far field, and cannot be well offset in the far field, thereby affecting the sound leakage prevention effect of the sound-emitting devices.

[0057] In order to at least partially solve one or more of the above-mentioned problems and other potential problems, the first aspect of the present application proposes a sound-emitting device. Specifically, a sound-emitting device is proposed in which the first and second parts of a voice coil vibrate in the same direction, thereby driving the first diaphragm and the second diaphragm to vibrate in the same direction, so as to ensure the consistency of the sound radiated forward and backward by the sound-emitting device.

[0058] The sound-generating device of the first aspect of the present application can be applied, for example, to a head-mounted device, which may include, but is not limited to, a VR (virtual reality) device, an AR (augmented reality) device, an MR (mixed reality) device, an XR (extended reality) device, or smart glasses. Taking smart glasses as an example, the smart glasses may include a frame and first and second temples disposed at both ends of the frame, each of which is equipped with a sound-generating device. It should be understood that the sound-generating device can also be applied to other electronic devices, and this application does not impose specific limitations on this.

[0059] Figure 1 Schematic diagram of the structure of a sound-generating device according to an exemplary embodiment of the present application. Figure 2Schematic diagram of the structure of a sound-generating device (vibration component not shown) according to an exemplary embodiment of the present application. Figure 6 2 is a schematic structural diagram of a sound-generating device (showing a first shell) according to an exemplary embodiment of the present application. Figure 14 and Figure 15 They are respectively schematic structural diagrams of a sound-emitting device (showing the second shell) according to exemplary embodiments of the present application.

[0060] refer to Figures 1 to 4 、 Figure 7 as well as Figure 8 The sound-generating device 100 may include a vibration assembly 110, a voice coil 120, and a magnetic circuit system 130. The vibration assembly 110 may include a first diaphragm 111 and a second diaphragm 112. The first diaphragm 111 and the second diaphragm 112 may be spaced apart in a first direction. The voice coil 120 may include a first portion 121 and a second portion 122. The first portion 121 may be connected to the first diaphragm 111, and the second portion 122 may be connected to the second diaphragm 112. The magnetic circuit system 130 may include a first magnetic gap 135 and a second magnetic gap 136. The first portion 121 of the voice coil 120 may be located in the first magnetic gap 135, and the second portion 122 of the voice coil 120 may be located in the second magnetic gap 136. When driven by the magnetic circuit system 130, the first portion 121 of the voice coil 120 may vibrate in the same direction as the second portion 122 of the voice coil 120.

[0061] The first portion 121 of the voice coil 120 is located within the first magnetic gap 135 of the magnetic circuit system 130 and connected to the first diaphragm 111. The second portion 122 of the voice coil 120 is located within the second magnetic gap 136 of the magnetic circuit system 130 and connected to the second diaphragm 112. Under the action of the magnetic circuit system 130, the first and second portions 121, 122 of the voice coil 120 vibrate in the same direction, driving the first and second diaphragms 111, 112 to vibrate in the same direction, resonating with the surrounding air and producing sound. The same-direction vibration of the first and second diaphragms 111, 112 helps ensure the consistency of the sound radiated forward and backward by the sound-emitting device 100. This effectively short-circuits and cancels the forward and backward radiated sounds in the far field due to the 180° phase difference, thereby improving the sound leakage prevention effect of the sound-emitting device 100. The vibration directions of the first and second diaphragms 111, 112 can be parallel to the first direction. It should be noted that “rear” may be the direction indicated by the arrow in the Z direction, and “front” may be the direction opposite to the direction indicated by the arrow in the Z direction.

[0062] In an exemplary embodiment, reference Figure 5, the voice coil 120 may be ring-shaped. The voice coil 120 may extend on a plane formed by the first direction and the third direction. The first portion 121 and the second portion 122 of the voice coil 120 may be located on opposite sides of the voice coil 120 in the first direction. When an alternating audio current is input into the voice coil 120, the voice coil 120 may be subjected to an alternating driving force to generate an alternating motion, and drive the first diaphragm 111 and the second diaphragm 112 to vibrate simultaneously forward or simultaneously backward, repeatedly pushing the surrounding air to produce sound. It should be noted that the current direction of the first portion 121 of the voice coil 120 is opposite to the current direction of the second portion 122 of the voice coil 120.

[0063] In an exemplary embodiment, reference Figure 5 The sound-emitting device 100 may further include a voice coil support plate 123. The voice coil support plate 123 may be disposed in the cavity defined by the voice coil 120. Furthermore, the voice coil support plate 123 may be disposed in the middle area of ​​the above-mentioned cavity. One side of the voice coil support plate 123 may be connected to the first portion 121 of the voice coil 120, and the other side may be connected to the second portion 122 of the voice coil 120. The number of voice coil support plates 123 is the same as the number of voice coils 120. In other words, each voice coil 120 corresponds to a voice coil support plate 123. By providing the voice coil support plate 123, the support and shaping of the voice coil 120 can be achieved.

[0064] In an exemplary embodiment, reference Figure 5 The sound-emitting device 100 may further include a first coupling member 124 and a second coupling member 125. The first coupling member 124 may be provided at the first portion 121 of the voice coil 120, and is used to connect the first portion 121 with the first diaphragm 111. The second coupling member 125 may be provided at the second portion 122 of the voice coil 120, and is used to connect the second portion 122 with the second diaphragm 112. The number of first coupling members 124 and second coupling members 125 is the same as the number of voice coils 120. In other words, each voice coil 120 corresponds to a first coupling member 124 and a second coupling member 125. By providing the first coupling member 124 and the second coupling member 125, the connection between the voice coil 120 and the first diaphragm 111 and the second diaphragm 112 can be achieved.

[0065] In an exemplary embodiment, reference Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11The direction of the Ampere force exerted on the first portion 121 of the voice coil 120 in the first magnetic gap 135 can be the same as the direction of the Ampere force exerted on the second portion 122 of the voice coil 120 in the second magnetic gap 136. By controlling the directions of the Ampere forces exerted on the first portion 121 and the second portion 122 of the voice coil 120 to be the same, the first portion 121 and the second portion 122 of the voice coil 120 can be made to vibrate in the same direction, thereby driving the first diaphragm 111 and the second diaphragm 112 to vibrate in the same direction. This ensures that the sound radiated from the sound device 100 toward the front and rear is consistent, thereby improving the sound leakage prevention effect of the sound device 100.

[0066] In an exemplary embodiment, reference Figure 2 、 Figure 3 and Figure 7 The number of voice coils 120 may be multiple, and the multiple voice coils 120 may be spaced apart in a second direction intersecting the first direction. The magnetic circuit system 130 may have multiple first magnetic gaps 135 and multiple second magnetic gaps 136. The first portions 121 of the multiple voice coils 120 may be located in the multiple first magnetic gaps 135, and the second portions 122 of the multiple voice coils 120 may be located in the multiple second magnetic gaps 136.

[0067] As an example, the number of voice coils 120 may be two, and the two voice coils 120 may be spaced apart in the second direction. The two voice coils 120 may include a first voice coil 1201 and a second voice coil 1202. Accordingly, the magnetic circuit system 130 may include two first magnetic gaps 135 and two second magnetic gaps 136 ( Figure 8 ). Further, the two voice coils 120 may be symmetrically arranged.

[0068] As an example, the number of voice coils 120 may be three, and the three voice coils 120 may be spaced apart in the second direction. The three voice coils 120 may include a first voice coil 1201, a second voice coil 1202, and a third voice coil (not shown). Accordingly, the magnetic circuit system 130 may include three first magnetic gaps 135 and three second magnetic gaps 136 ( Figure 10 ).

[0069] As an example, the number of voice coils 120 may be four, and the four voice coils 120 may be spaced apart in the second direction. The four voice coils 120 may include a first voice coil 1201, a second voice coil 1202, a third voice coil (not shown), and a fourth voice coil (not shown). Accordingly, the magnetic circuit system 130 may include four first magnetic gaps 135 and four second magnetic gaps 136 ( Figure 9 and Figure 11 ).

[0070] The Ampere forces acting on the first portions 121 of the multiple voice coils 120 in the first magnetic gap 135 are directed in the same direction, and the Ampere forces acting on the second portions 122 of the multiple voice coils 120 in the second magnetic gap 136 are directed in the same direction. By controlling the Ampere forces acting on the first portions 121 and second portions 122 of the multiple voice coils 120 in the same direction, the multiple voice coils 120 can be ensured to vibrate in the same direction, increasing the amplitude of the first diaphragm 111 and the second diaphragm 112, thereby improving the sound pressure level of the sound-generating device 100.

[0071] It should be understood that the number of two, three or four voice coils 120 is only exemplary, and the number of voice coils 120 can be adjusted according to actual needs. This application does not impose any specific limitation on the number of voice coils 120.

[0072] In an exemplary embodiment, reference Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11 Magnetic circuit system 130 forms first magnetic lines of force near first magnetic gap 135, and second magnetic lines of force near second magnetic gap 136, with the first and second magnetic lines of force directed in opposite directions. When audio current is input to voice coil 120, because the current in first portion 121 and second portion 122 are directed in opposite directions, the Ampere force acting on first portion 121 in first magnetic gap 135 and second portion 122 in second magnetic gap 136 are directed in the same direction. As a result, first portion 121 and second portion 122 can vibrate in the same direction, thereby driving first diaphragm 111 and second diaphragm 112 to vibrate in the same direction. This ensures consistency in the sound radiated forward and backward by sound-generating device 100, improving sound leakage prevention.

[0073] In an exemplary embodiment, reference Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11The magnetic circuit system 130 may include a first central magnet 131, a second central magnet 132, a first side magnet 133, and a second side magnet 134. The first central magnet 131 and the second central magnet 132 may be located between the first diaphragm 111 and the second diaphragm 112 and spaced apart in the first direction. A predetermined distance may exist between the first central magnet 131 and the first diaphragm 111, and a predetermined distance may exist between the second central magnet 132 and the second diaphragm 112. In other words, the first central magnet 131 and the first diaphragm 111 are not in contact with each other, and the second central magnet 132 and the second diaphragm 112 are not in contact with each other. The first side magnet 133 and the second side magnet 134 may be located on opposite sides of the first central magnet 131 and the second central magnet 132 along the second direction. A first magnetic gap 135 may be formed between the first side magnet 133 and the second side magnet 134 and the first central magnet 131, respectively. A second magnetic gap 136 may be formed between the first side magnet 133 and the second side magnet 134 and the second central magnet 132, respectively.

[0074] A predetermined distance can be maintained between the first portion 121 of the voice coil 120 and the first central magnet 131, the first side magnets 133, and the second side magnets 134. A predetermined distance can be maintained between the second portion 122 of the voice coil 120 and the second central magnet 132, the first side magnets 133, and the second side magnets 134. In other words, the first portion 121 of the voice coil 120 does not contact the first central magnet 131, the first side magnets 133, and the second side magnets 134, and the second portion 122 of the voice coil 120 does not contact the second central magnet 132, the first side magnets 133, and the second side magnets 134.

[0075] In an exemplary embodiment, reference Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11 The first side magnet 133 may have a first end proximate to the first central magnet 131 and a second end proximate to the second central magnet 132. The first end may have a first magnetic pole, the second end may have a second magnetic pole, and the magnetism of the first magnetic pole may be opposite to the magnetism of the second magnetic pole. Similarly, the second side magnet 134 may have a first end proximate to the first central magnet 131 and a second end proximate to the second central magnet 132. The first end may have a first magnetic pole, the second end may have a second magnetic pole, and the magnetism of the first magnetic pole may be opposite to the magnetism of the second magnetic pole. The first magnetic poles of the first side magnet 133 and the second magnetic poles of the second side magnet 134 may have opposite magnetism, and the magnetism of the second magnetic poles may be opposite.

[0076] The magnetic pole of the first central magnet 131 near the first side magnet 133 may have opposite magnetic properties to the first magnetic pole of the first side magnet 133. The magnetic pole of the second central magnet 132 near the first side magnet 133 may have opposite magnetic properties to the second magnetic pole of the first side magnet 133. The magnetic pole of the first central magnet 131 near the second side magnet 134 may have opposite magnetic properties to the first magnetic pole of the second side magnet 134. The magnetic pole of the second central magnet 132 near the second side magnet 134 may have opposite magnetic properties to the second magnetic pole of the second side magnet 134.

[0077] For example, the first magnetic pole of the first side magnet 133 may be a south pole (S pole), and the second magnetic pole may be a north pole (N pole); the first magnetic pole of the second side magnet 134 may be an N pole, and the second magnetic pole may be an S pole; the magnetic pole of the first central magnet 131 close to the first side magnet 133 may be an N pole, and the magnetic pole of the first central magnet 131 close to the second side magnet 134 may be an S pole; the magnetic pole of the second central magnet 132 close to the first side magnet 133 may be an S pole, and the magnetic pole of the second central magnet 132 close to the second side magnet 134 may be an N pole.

[0078] For another example, the first magnetic pole of the first side magnet 133 may be an N pole, and the second magnetic pole may be an S pole; the first magnetic pole of the second side magnet 134 may be an S pole, and the second magnetic pole may be an N pole; the magnetic pole of the first central magnet 131 close to the first side magnet 133 may be an S pole, and the magnetic pole of the first central magnet 131 close to the second side magnet 134 may be an N pole; the magnetic pole of the second central magnet 132 close to the first side magnet 133 may be an N pole, and the magnetic pole of the second central magnet 132 close to the second side magnet 134 may be an S pole.

[0079] The first central magnet 131 and the first side magnet 133 and the second side magnet 134 can respectively form first magnetic lines of force near the first magnetic gap 135, and the second central magnet 132 and the first side magnet 133 and the second side magnet 134 can respectively form second magnetic lines of force near the second magnetic gap 136, and the directions of the multiple first magnetic lines of force are the same, the directions of the multiple second magnetic lines of force are the same, and the directions of the first magnetic lines of force and the second magnetic lines of force are opposite. When audio current is input to the voice coil 120, the direction of the Ampere force exerted on the first portion 121 of the multiple voice coils 120 in the first magnetic gap 135 is the same as the direction of the Ampere force exerted on the second portion 122 of the multiple voice coils 120 in the second magnetic gap 136. The first portion 121 and the second portion 122 of the multiple voice coils 120 can vibrate in the same direction, thereby driving the first diaphragm 111 and the second diaphragm 112 to vibrate in the same direction, ensuring the consistency of sound radiation to the front and rear of the sound-emitting device 100, improving the sound leakage prevention effect of the sound-emitting device 100, and at the same time increasing the amplitude of the first diaphragm 111 and the second diaphragm 112, thereby improving the sound pressure level of the sound-emitting device 100.

[0080] In an exemplary embodiment, reference Figure 7 and Figure 8 The number of voice coils 120 may be two. The two voice coils 120 may include a first voice coil 1201 and a second voice coil 1202. The first portion 121 of the first voice coil 1201 may be located between the first side magnet 133 and the first center magnet 131, and the second portion 122 may be located between the first side magnet 133 and the second center magnet 132. The first portion 121 of the second voice coil 1202 may be located between the second side magnet 134 and the first center magnet 131, and the second portion 122 may be located between the second side magnet 134 and the second center magnet 132.

[0081] An audio current is input to the first voice coil 1201 and the second voice coil 1202. The current directions of the first voice coil 1201 and the second voice coil 1202 are the same, that is, the current directions of the first parts 121 of the first voice coil 1201 and the second voice coil 1202 are the same, and the current directions of the second parts 122 of the first voice coil 1201 and the second voice coil 1202 are the same. This can make the Ampere force acting on the first parts 121 and the second parts 122 of the two voice coils in the same direction, thereby achieving the same-directional vibration of the two voice coils, ensuring the consistency of sound radiation to the front and rear of the sound-emitting device 100, improving the sound leakage prevention effect of the sound-emitting device 100, and at the same time increasing the amplitude of the first diaphragm 111 and the second diaphragm 112, thereby improving the sound pressure level of the sound-emitting device 100.

[0082] In an exemplary embodiment, reference Figure 9 In the second direction, there can be multiple magnetic circuit systems 130. Furthermore, for two adjacent magnetic circuit systems 130 in the second direction, the directions of the first magnetic force lines of the two magnetic circuit systems 130 can be opposite, and the directions of the second magnetic force lines of the two magnetic circuit systems 130 can be opposite. The magnetic properties of the first magnetic poles of the first side magnets 133 of the two magnetic circuit systems 130 can be opposite, and the magnetic properties of the first magnetic poles of the second side magnets 134 can be opposite.

[0083] For example, there may be two magnetic circuit systems 130, each of which may include a first magnetic circuit system 1301 and a second magnetic circuit system 1302. For the first magnetic circuit system 1301 and the second magnetic circuit system 1302, the directions of the first magnetic lines of force may be opposite, and the directions of the second magnetic lines of force may be opposite; the magnetism of the first magnetic poles of the first side magnets 133 may be opposite, and the magnetism of the first magnetic poles of the second side magnets 134 may be opposite.

[0084] As an example, for two adjacent magnetic circuit systems 130 in the second direction, the second side magnet 134 of one magnetic circuit system 130 and the first side magnet 133 of the other magnetic circuit system 130 may be connected (e.g., forming an integral structure). For example, the second side magnet 134 of the first magnetic circuit system 1301 and the first side magnet 133 of the second magnetic circuit system 1302 may be formed into an integral structure.

[0085] As an example, for two adjacent magnetic circuit systems 130 in the second direction, the current directions of the voice coils corresponding to the two magnetic circuit systems 130 may be opposite. The current directions of the voice coils corresponding to each magnetic circuit system 130 may be the same. For example, the current directions of the first voice coil 1201 and the second voice coil 1202 are the same, the current directions of the third voice coil and the fourth voice coil are the same, and the current directions of the second voice coil 1202 and the third voice coil are opposite.

[0086] By inputting audio current into the first voice coil 1201, the second voice coil 1202, the third voice coil and the fourth voice coil, the Ampere force acting on the first part 121 and the second part 122 of the multiple voice coils can be made to have the same direction, thereby achieving the same-directional vibration of the multiple voice coils, ensuring the consistency of the sound radiated forward and backward by the sound-emitting device 100, improving the sound leakage prevention effect of the sound-emitting device 100, and at the same time increasing the amplitude of the first diaphragm 111 and the second diaphragm 112, thereby improving the sound pressure level of the sound-emitting device 100.

[0087] It should be understood that the number of four voice coils 120 is merely exemplary, and the number of voice coils 120 may be an even number. Accordingly, the number of magnetic circuit systems 130 in the second direction may also be an even number, and this application does not impose any specific limitation on this.

[0088] In an exemplary embodiment, reference Figure 10 and Figure 11 The number of first central magnets 131 may be multiple, and the multiple first central magnets 131 may be located between the first side magnets 133 and the second side magnets 134 and spaced apart in the second direction. The number of second central magnets 132 may be multiple, and the multiple second central magnets 132 may be located between the first side magnets 133 and the second side magnets 134 and spaced apart in the second direction. A first magnetic gap 135 may be formed between two adjacent first central magnets 131, and a second magnetic gap 136 may be formed between two adjacent second central magnets 132. The two adjacent first central magnets 131 may form first magnetic lines of force near the first magnetic gap 135, and the two adjacent second central magnets 132 may form second magnetic lines of force near the second magnetic gap 136, and the first and second magnetic lines of force are in opposite directions.

[0089] As an example, a predetermined distance may be provided between the first portion 121 of the voice coil 120 (e.g., the second voice coil 1202 and / or the third voice coil) and the two first central magnets 131, and a predetermined distance may be provided between the second portion 122 and the two second central magnets 132. In other words, the first portion 121 of the voice coil 120 (e.g., the second voice coil 1202 and / or the third voice coil) does not contact the two first central magnets 131, and the second portion 122 does not contact the two second central magnets 132.

[0090] As an example, the first central magnet 131 may have a third end and a fourth end opposite each other in the second direction. The magnetic poles of the third ends of the plurality of first central magnets 131 may have the same magnetic properties, and the magnetic poles of the fourth ends may have the same magnetic properties. The second central magnet 132 may have a third end and a fourth end opposite each other in the second direction. The magnetic poles of the third ends of the plurality of second central magnets 132 may have the same magnetic properties, and the magnetic poles of the fourth ends may have the same magnetic properties.

[0091] As an example, the directions of the plurality of first magnetic force lines of the magnetic circuit system 130 may be the same, and the directions of the plurality of second magnetic force lines may be the same.

[0092] As an example, the current directions of the plurality of voice coils 120 may be the same, for example, the current directions of the first voice coil 1201 , the second voice coil 1202 , the third voice coil, and / or the fourth voice coil may be the same.

[0093] By inputting audio current into the first voice coil 1201, the second voice coil 1202, the third voice coil and / or the fourth voice coil, the Ampere force acting on the first part 121 and the second part 122 of the multiple voice coils can be made to have the same direction, thereby achieving the same-directional vibration of the multiple voice coils, ensuring the consistency of the sound radiated forward and backward by the sound-emitting device 100, improving the sound leakage prevention effect of the sound-emitting device 100, and at the same time increasing the amplitude of the first diaphragm 111 and the second diaphragm 112, thereby improving the sound pressure level of the sound-emitting device 100.

[0094] In an exemplary embodiment, reference Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11 The magnetic circuit system 130 may further include a magnetic circuit support plate 137. The magnetic circuit support plate 137 may be disposed between the first central magnet 131 and the second central magnet 132. One end of the magnetic circuit support plate 137 contacts the first central magnet 131, and the other end contacts the second central magnet 132. The magnetic circuit support plate 137 may be a non-magnetic plate. For example, the magnetic circuit support plate 137 may be made of a non-magnetic material, which may include, but is not limited to, aluminum.

[0095] In an exemplary embodiment, reference Figures 1 to 4 as well as Figure 12In the third direction, there can be multiple magnetic circuit systems 130, and the multiple magnetic circuit systems 130 can be spaced apart along the third direction. In other words, each voice coil 120 corresponds to multiple magnetic circuit systems 130 spaced apart along the third direction. For the multiple magnetic circuit systems 130 corresponding to each voice coil 120 in the third direction, the directions of the first magnetic force lines of the multiple magnetic circuit systems 130 can be the same, and the directions of the second magnetic force lines of the multiple magnetic circuit systems 130 can be the same. This ensures that the Ampere force acting on each voice coil 120 at different positions in the third direction is in the same direction, achieving unidirectional vibration of each voice coil 120 at different positions in the third direction, increasing the amplitude of the first diaphragm 111 and the second diaphragm 112, and improving the sound pressure level of the sound-generating device 100.

[0096] As an example, for the multiple magnetic circuit systems 130 corresponding to each voice coil 120 in the third direction, the first central magnets 131 can be arranged at intervals, the second central magnets 132 can be arranged at intervals, the first side magnets 133 can be arranged at intervals, and the second side magnets 134 can be arranged at intervals.

[0097] As an example, the structures of the multiple magnetic circuit systems 130 corresponding to each voice coil 120 in the third direction are identical. For example, the first magnetic poles of the first side magnets 133 of the multiple magnetic circuit systems 130 corresponding to each voice coil 120 in the third direction may have the same magnetic properties, and the first magnetic poles of the second side magnets 134 may have the same magnetic properties.

[0098] As an example, for a plurality of magnetic circuit systems 130 corresponding to each voice coil 120 in the third direction, the magnetic circuit support plates 137 may be connected.

[0099] As an example, each voice coil 120 corresponds to two magnetic circuit systems 130 spaced apart in the third direction. For example, the first voice coil 1201 corresponds to two magnetic circuit systems 130 in the third direction, and the second voice coil 1202 corresponds to two magnetic circuit systems 130 in the third direction.

[0100] It should be understood that the number of two magnetic circuit systems 130 corresponding to each voice coil 120 in the third direction is merely exemplary. The number of magnetic circuit systems 130 corresponding to each voice coil 120 in the third direction can be adaptively adjusted according to the extension length of the voice coil 120 in the third direction. This application does not impose any specific restriction on the number of magnetic circuit systems 130 corresponding to each voice coil 120 in the third direction.

[0101] In an exemplary embodiment, reference Figure 6 and Figure 13The sound-generating device 100 may further include a first fold 140, a second fold 150, a third fold 160, and a first housing 170. One end of the first fold 140 in the second direction may be connected to the voice coil support plate 123, and the other end may be connected to the magnetic circuit support plate 137. The number of first folds 140 may be the same as the number of voice coils 120. The second fold 150 may be used to connect the first diaphragm 111 to the first housing 170. The third fold 160 may be used to connect the second diaphragm 112 to the first housing 170. By providing the first fold 140, the second fold 150, and the third fold 160, the sound-generating device 100 may have three folds in the vibration direction (e.g., the first direction). This helps ensure that the first diaphragm 111 and the second diaphragm 112 can still vibrate along the first direction at a large amplitude without polarization, thereby minimizing the noise problem of the sound-generating device 100.

[0102] Furthermore, when the sound-generating device 100 has only one or two surrounds in the vibration direction (e.g., the first direction), polarization occurs when the first diaphragm 111 and the second diaphragm 112 vibrate in the first direction at a large amplitude, resulting in noise. To avoid this noise, the amplitudes of the first diaphragm 111 and the second diaphragm 112 must be designed to be very small, failing to provide a high sound pressure level. When the sound-generating device 100 has three surrounds in the vibration direction (e.g., the first direction), the voice coil 120 and / or the magnetic circuit system 130 can be designed to provide a larger amplitude, thereby displacing more surrounding air and providing a higher sound pressure level.

[0103] It should be noted that the design of the vibration component 110 including two diaphragms has provided two support points for the vibration component 110 in the vibration direction (for example, the first direction). Combined with the above-mentioned three folding rings, it can further ensure that the vibration component 110 can still vibrate along the first direction at a larger amplitude without polarization, thereby improving the noise problem of the sound-emitting device 100 as much as possible.

[0104] In an exemplary embodiment, reference Figure 5 and Figure 13 The voice coil support plate 123 may be provided with an opening 1231, which may extend through the voice coil support plate 123 along the second direction. The magnetic circuit support plate 137 may be provided with a groove corresponding to the opening 1231. One end of the first fold 140 in the second direction may be embedded in the opening 1231, and the other end may be embedded in the groove. By embedding the first fold 140 in the opening 1231 and the groove at both ends in the second direction, respectively, the space dimension of the sound-generating device 100 can be minimized, reducing the volume of the sound-generating device 100 and facilitating miniaturization of the sound-generating device 100.

[0105] In an exemplary embodiment, reference Figure 14 、 Figure 15and Figure 16 The sound-emitting device 100 may further include a second housing 180. The second housing 180 may include a first cover plate 181, a second cover plate 182, a third cover plate 183, and a fourth cover plate 184. The first cover plate 181 and the second cover plate 182 may be spaced apart from each other in the first direction, the third cover plate 183 may be used to connect the first cover plate 181 and the second cover plate 182, and the fourth cover plate 184 may be used to connect the first cover plate 181 and the second cover plate 182.

[0106] The first cover plate 181 and the first diaphragm 111 may define a first cavity 1811. The second cover plate 182 and the second diaphragm 112 may define a second cavity 1821. The third cover plate 183 may be provided with a first sound outlet hole 1831, which may communicate with the first cavity 1811. The fourth cover plate 184 may be provided with a second sound outlet hole 1841, which may communicate with the second cavity 1821.

[0107] When a user wears the above-described sound-emitting device 100, the second sound outlet 1841 can be located on the side of the second housing 180 closer to the user's ear, and the first sound outlet 1831 can be located on the side of the second housing 180 farther from the user's ear. The voice coil inputs an alternating audio current, and the sound-emitting device 100 radiates sound backward through the first sound outlet 1831 and forward through the second sound outlet 1841. In other words, the sound radiated from the second sound outlet 1841 is transmitted to the user's ear. By placing the first sound outlet 1831 as far away from the user's ear as possible, phase cancellation in the near field can be reduced.

[0108] As an example, the area of ​​the first sound outlet 1831 can be substantially the same as the area of ​​the second sound outlet 1841. By controlling the areas of the first sound outlet 1831 and the second sound outlet 1841 to be substantially the same, the consistency of the sound radiated forward and backward by the sound emitting device 100 can be further ensured, so that the sound radiated forward and the sound radiated backward are better offset in the far field, thereby improving the sound leakage prevention effect of the sound emitting device 100.

[0109] As an example, the distance between the first cover plate 181 and the first diaphragm 111 can be substantially the same as the distance between the second cover plate 182 and the second diaphragm 112. In other words, the heights of the first cavity 1811 and the second cavity 1821 in the first direction are substantially the same. By controlling the heights of the first cavity 1811 and the second cavity 1821 in the first direction to be substantially the same, the consistency of the sound radiated forward and backward by the sound-emitting device 100 can be further ensured, so that the sound radiated forward and the sound radiated backward are better offset in the far field, thereby improving the sound leakage prevention effect of the sound-emitting device 100.

[0110] A second aspect of the present application provides an electronic device. The electronic device may include the sound-generating device described in the first aspect of the present application. The electronic device may be, for example, a head-mounted device, which may include, but is not limited to, a VR (virtual reality) device, an AR (augmented reality) device, an MR (mixed reality) device, an XR (extended reality) device, smart glasses, and the like.

[0111] Figure 17 The following is a schematic diagram of the structure of an electronic device according to an exemplary embodiment of the present application. Taking the electronic device as smart glasses as an example, the electronic device may include a frame 210 and a first temple 220 and a second temple 230 provided at both ends of the frame 210. The first temple 220 and the second temple 230 are respectively equipped with a sound-generating device, for example, Figure 17 A sound-generating device is installed in area I.

[0112] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the utility model disclosed in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, the above-mentioned features may be replaced with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A sound-generating device, characterized in that: include: The vibration assembly includes a first vibration membrane and a second vibration membrane spaced apart in a first direction; A magnetic circuit system comprising a first magnetic gap and a second magnetic gap; as well as A voice coil includes a first part and a second part, wherein the first part is located in the first magnetic gap and connected to the first diaphragm, and the second part is located in the second magnetic gap and connected to the second diaphragm. The vibration direction of the first part under the drive of the magnetic circuit system is the same as the vibration direction of the second part under the drive of the magnetic circuit system.

2. The sound-generating device according to claim 1, wherein: There are multiple voice coils, and the multiple voice coils are arranged at intervals in a second direction intersecting the first direction.

3. The sound-generating device according to claim 2, characterized in that: The magnetic circuit system has a plurality of first magnetic gaps and a plurality of second magnetic gaps. The first portions of the plurality of voice coils are respectively located in the plurality of first magnetic gaps, and the second portions of the plurality of voice coils are respectively located in the plurality of second magnetic gaps.

4. The sound-generating device according to claim 3, characterized in that: The Ampere force exerted on the first parts of the plurality of voice coils in the first magnetic gap is in the same direction, and the Ampere force exerted on the second parts of the plurality of voice coils in the second magnetic gap is in the same direction.

5. The sound-generating device according to claim 1, characterized in that: The direction of the Ampere force exerted on the first portion of the voice coil in the first magnetic gap is the same as the direction of the Ampere force exerted on the second portion of the voice coil in the second magnetic gap.

6. The sound-generating device according to claim 3, characterized in that: The magnetic circuit system comprises: a first central magnet and a second central magnet, the first central magnet and the second central magnet being located between the first diaphragm and the second diaphragm and spaced apart in the first direction; and a first side magnet and a second side magnet, wherein the first side magnet and the second side magnet are respectively located on opposite sides of the first center magnet and the second center magnet along the second direction, a first magnetic gap is respectively formed between the first side magnet, the second side magnet and the first center magnet, and a second magnetic gap is respectively formed between the first side magnet, the second side magnet and the second center magnet.

7. The sound-generating device according to claim 6, characterized in that: Each of the first side magnet and the second side magnet has a first end close to the first center magnet and a second end close to the second center magnet, the first end has a first magnetic pole, and the second end has a second magnetic pole, and the magnetic properties of the first magnetic pole are opposite to the magnetic properties of the second magnetic pole; The magnetic pole of the first central magnet close to the first side magnet is opposite to the first magnetic pole of the first side magnet, and the magnetic pole of the second central magnet close to the first side magnet is opposite to the second magnetic pole of the first side magnet; and The magnetic pole of the first central magnet close to the second side magnet is opposite to the first magnetic pole of the second side magnet, and the magnetic pole of the second central magnet close to the second side magnet is opposite to the second magnetic pole of the second side magnet.

8. The sound-generating device according to claim 7, characterized in that: The first magnetic poles of the first side magnet and the second side magnet have opposite magnetic properties, and the second magnetic poles have opposite magnetic properties.

9. The sound-generating device according to claim 7, characterized in that: In the second direction, there are multiple magnetic circuit systems, and the first magnetic poles of the first side magnets of two adjacent magnetic circuit systems have opposite magnetism, and the first magnetic poles of the second side magnets of two adjacent magnetic circuit systems have opposite magnetism.

10. The sound-generating device according to claim 6, characterized in that: There are multiple first central magnets, and the multiple first central magnets are located between the first side magnets and the second side magnets and are spaced apart in the second direction; as well as There are multiple second central magnets, and the multiple second central magnets are located between the first side magnets and the second side magnets and are spaced apart in the second direction. A first magnetic gap is formed between two adjacent first central magnets, and a second magnetic gap is formed between two adjacent second central magnets.

11. The sound generating device according to claim 10, characterized in that: The first central magnet and the second central magnet have a third end and a fourth end disposed in the second direction; The magnetic poles at the third ends of the plurality of first central magnets have the same magnetic properties, and the magnetic poles at the fourth ends have the same magnetic properties; the magnetic poles at the third ends of the plurality of second central magnets have the same magnetic properties, and the magnetic poles at the fourth ends have the same magnetic properties.

12. The sound-generating device according to claim 6, characterized in that: There are two voice coils; the first portion of one voice coil is located between the first side magnet and the first center magnet, and the second portion is located between the first side magnet and the second center magnet; the first portion of the other voice coil is located between the second side magnet and the first center magnet, and the second portion is located between the second side magnet and the second center magnet.

13. The sound generating device according to any one of claims 6 to 12, characterized in that: In the third direction, the number of the magnetic circuit systems is plural, and the plurality of magnetic circuit systems are arranged at intervals along the third direction, wherein the third direction intersects with the first direction and the second direction.

14. The sound generating device according to any one of claims 7 to 9, characterized in that: In the third direction, the number of the magnetic circuit systems is plural, and the plurality of magnetic circuit systems are arranged at intervals along the third direction, wherein the third direction intersects the first direction and the second direction; The first magnetic poles of the first side magnets of the plurality of magnetic circuit systems in the third direction have the same magnetic properties, and the first magnetic poles of the second side magnets have the same magnetic properties.

15. The sound generating device according to claim 13, wherein: The first central magnets of the plurality of magnetic circuit systems in the third direction are arranged at intervals, the second central magnets are arranged at intervals, the first side magnets are arranged at intervals, and the second side magnets are arranged at intervals.

16. The sound generating device according to any one of claims 6 to 12, characterized in that: The magnetic circuit system further comprises: The magnetic circuit support plate is arranged between the first central magnet and the second central magnet, and the magnetic circuit support plate is a non-magnetic conductive plate.

17. The sound generating device according to claim 16, wherein: The voice coil is in a ring shape; the sound-generating device further comprises: The voice coil support plate is arranged in the cavity defined by the voice coil.

18. The sound generating device according to claim 17, characterized in that: The sound-generating device further comprises: A first fold ring, wherein one end of the first fold ring in the second direction is connected to the voice coil support plate, and the other end is connected to the magnetic circuit support plate.

19. The sound generating device according to claim 18, wherein: The voice coil support plate is provided with an opening, and the opening passes through the voice coil support plate along the second direction, and the magnetic circuit support plate is provided with a groove corresponding to the opening; one end of the first fold ring in the second direction is embedded in the opening, and the other end is embedded in the groove.

20. The sound-generating device according to any one of claims 1 to 12, characterized in that: The sound-generating device further comprises: a first shell; a second fold ring, used to connect the first diaphragm and the first shell; and The third fold ring is used to connect the second diaphragm and the first shell.

21. The sound-generating device according to any one of claims 1 to 12, characterized in that: The sound-generating device further includes a second shell, the second shell including: a first cover plate, wherein the first cover plate and the first diaphragm define a first cavity; a second cover plate, wherein the second cover plate and the second diaphragm define a second cavity; a third cover plate, used to connect the first cover plate and the second cover plate, the third cover plate being provided with a first sound outlet hole, the first sound outlet hole being in communication with the first cavity; and The fourth cover plate is used to connect the first cover plate and the second cover plate. The fourth cover plate is provided with a second sound outlet hole, and the second sound outlet hole is connected to the second cavity.

22. The sound-generating device according to claim 21, characterized in that The area of ​​the first sound outlet hole is the same as the area of ​​the second sound outlet hole.

23. The sound-generating device according to claim 21, characterized in that The distance between the first cover plate and the first diaphragm is the same as the distance between the second cover plate and the second diaphragm.

24. The sound-generating device according to any one of claims 1 to 12, characterized in that The sound-generating device further comprises: a first coupling member, disposed on the first portion of the voice coil and used to connect the first portion and the first diaphragm; and The second coupling member is disposed on the second portion of the voice coil and is used to connect the second portion and the second diaphragm.

25. An electronic device, characterized in that: Comprising the sound-generating device according to any one of claims 1 to 24.

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