Sounding 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 plurality of voice coils, a connecting piece and a plurality of magnetic circuit systems, the vibration assembly comprises a first vibrating diaphragm and a second vibrating diaphragm which are arranged at an interval in a first direction; the plurality of voice coils are arranged at intervals in a second direction intersecting with the first direction, each voice coil comprises a first part and a second part, the first part is connected with the first vibrating diaphragm, and the second part is connected with the second vibrating diaphragm; the connecting piece is used for connecting a plurality of voice coils; each magnetic circuit system comprises a first magnetic gap and a second magnetic gap; wherein the first parts of the plurality of voice coils are respectively located in the first magnetic gaps of the plurality of magnetic circuit systems, the second parts of the plurality of voice coils are respectively located in the second magnetic gaps of the plurality of magnetic circuit systems, and the vibration direction of the first parts of the plurality of voice coils under the driving of the magnetic circuit systems is the same as the vibration direction of the second parts of the plurality of voice coils under the driving of the magnetic circuit systems.

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 advancement of science and technology, electronic devices with sound-generating capabilities are rapidly emerging, such as smart glasses, mobile phones, tablets, and other electronic devices. For these electronic devices with sound-generating functions, sound-generating devices are essential components, and their performance directly affects the user experience of these electronic devices.

[0003] Sound emitting devices can include single-sided and double-sided devices. Double-sided devices produce a higher sound pressure level than single-sided devices and can reduce vibration when the device is in operation. However, existing double-sided devices radiate sound inconsistently, both forward and backward, and have poor sound leakage prevention. Utility Model Content

[0004] According to a first aspect of the present application, there is provided a sound-generating device, comprising a vibration assembly, a plurality of voice coils, a connector, and a plurality of magnetic circuit systems. The vibration assembly comprises a first diaphragm and a second diaphragm spaced apart in a first direction. The plurality of voice coils are spaced apart in a second direction intersecting the first direction, and each voice coil comprises a first portion and a second portion, the first portion being connected to the first diaphragm, and the second portion being connected to the second diaphragm. The connector is used to connect the plurality of voice coils. Each magnetic circuit system comprises a first magnetic gap and a second magnetic gap. The first portions of the plurality of voice coils are respectively located in the first magnetic gaps of the plurality of magnetic circuit systems, the second portions of the plurality of voice coils are respectively located in the second magnetic gaps of the plurality of magnetic circuit systems, and the vibration direction of the first portions of the plurality of voice coils under the drive of the magnetic circuit system is the same as the vibration direction of the second portions of the plurality of voice coils under the drive of the magnetic circuit system.

[0005] According to an exemplary embodiment of the present application, a magnetic circuit system includes a first central magnet, a second central magnet, and side magnets. The first central magnet and the second central magnet are positioned between a first diaphragm and a second diaphragm and spaced apart in a first direction. The side magnets are positioned to one side of the first central magnet and the second central magnet along a second direction, forming a first magnetic gap between the side magnet and the first central magnet, and a second magnetic gap between the side magnet and the second central magnet.

[0006] According to an exemplary embodiment of the present application, the 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 magnetic properties of the first magnetic pole being opposite to those of the second magnetic pole. The magnetic pole of the first central magnet proximate to the first diaphragm has an opposite magnetic property to that of the first magnetic pole, while the magnetic pole of the first central magnet distal to the first diaphragm has the same magnetic property as that of the first magnetic pole. The magnetic pole of the second central magnet proximate to the second diaphragm has an opposite magnetic property to that of the second magnetic pole, while the magnetic pole of the second central magnet distal to the second diaphragm has the same magnetic property as that of the second magnetic pole.

[0007] According to an exemplary embodiment of the present application, the first portion of the voice coil is located in a portion of the first magnetic gap close to the first diaphragm, and the second portion of the voice coil is located in a portion of the second magnetic gap close to the second diaphragm.

[0008] 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 magnetic conductive plate.

[0009] According to an exemplary embodiment of the present application, the magnetic circuit system further includes a first magnetic conductive sheet, a second magnetic conductive sheet, and a third magnetic conductive sheet. The first magnetic conductive sheet is disposed on a side of the first central magnet close to the first diaphragm. The second magnetic conductive sheet is disposed on a side of the second central magnet close to the second diaphragm. The third magnetic conductive sheet is disposed on a side of the side magnet along the first direction.

[0010] According to an exemplary embodiment of the present application, the magnetic circuit system includes two third magnetic conductive sheets, and the two third magnetic conductive sheets are respectively arranged on opposite sides of the edge magnet along the first direction.

[0011] According to an exemplary embodiment of the present application, in the second direction, the first magnetic poles of the edge magnets of the plurality of magnetic circuit systems have the same magnetic properties, and the second magnetic poles have the same magnetic properties.

[0012] According to an exemplary embodiment of the present application, in the second direction, the first central magnets of at least two adjacent magnetic circuit systems are connected, and the second central magnets are connected.

[0013] According to an exemplary embodiment of the present application, there are two voice coils. In the second direction, the first central magnets of the two magnetic circuit systems are connected, the second central magnets are connected, and the side magnets of the two magnetic circuit systems are respectively located on opposite sides of the first central magnet along the second direction.

[0014] 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.

[0015] According to an exemplary embodiment of the present application, the voice coil support plate is provided with a plurality of openings spaced apart in a third direction, the openings penetrate the voice coil support plate along the second direction, or the openings penetrate at least a portion of the voice coil support plate along the second direction, wherein the third direction intersects with the second direction and the first direction.

[0016] According to an exemplary embodiment of the present application, the sound-generating device further includes a first housing, a first fold ring, and a second fold ring. The first fold ring is used to connect the first diaphragm to the first housing. The second fold ring is used to connect the second diaphragm to the first housing.

[0017] 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.

[0018] According to an exemplary embodiment of the present application, the connector extends along the second direction, and one end of the connector along the second direction is connected to one of the two adjacent voice coils, and the other end is connected to the other of the two adjacent voice coils.

[0019] According to an exemplary embodiment of the present application, the number of magnetic circuit systems in the second direction is the same as the number of voice coils.

[0020] 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.

[0021] 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.

[0022] A second aspect of the present application provides an electronic device comprising the sound-generating device as described in the first aspect of the present application.

[0023] In some embodiments of the present application, the vibration assembly includes a first diaphragm and a second diaphragm, the first part of each voice coil is located in the first magnetic gap of the corresponding magnetic circuit system and is connected to the first diaphragm, and the second part of each voice coil is located in the second magnetic gap of the corresponding magnetic circuit system and is connected to the second diaphragm. Under the action of the magnetic circuit system, the first and second parts of multiple voice coils vibrate in the same direction, thereby driving the first diaphragm and the second diaphragm to vibrate in the same direction, ensuring the consistency of 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

[0024] 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:

[0025] Figure 1 A schematic structural diagram of a sound-generating device according to an exemplary embodiment of the present application is shown;

[0026] Figure 2 A schematic structural diagram of a sound-generating device according to an exemplary embodiment of the present application is shown;

[0027] Figure 3 Shown Figure 2 A side view of a sound-generating device;

[0028] Figure 4 Shown Figure 2 A top view of a sound-generating device;

[0029] Figure 5 shows a schematic structural diagram of a voice coil according to an exemplary embodiment of the present application;

[0030] Figure 6 FIG2 shows a schematic diagram of the cooperation of two voice coils according to an exemplary embodiment of the present application;

[0031] Figure 7 Shown Figure 2 Schematic diagram of the aa section of the sound-generating device;

[0032] Figure 8 A schematic structural diagram of a sound-generating device according to an exemplary embodiment of the present application is shown;

[0033] Figure 9 Shown Figure 8 BB cross-sectional diagram of the sound-generating device;

[0034] Figure 10 Shown Figure 8 cc cross-sectional diagram of the sound-generating device;

[0035] Figure 11 shows a schematic diagram of a magnetic circuit system according to an exemplary embodiment of the present application;

[0036] Figure 12 shows a schematic diagram of a magnetic circuit system according to an exemplary embodiment of the present application;

[0037] Figure 13 shows a schematic diagram of a magnetic circuit system according to an exemplary embodiment of the present application;

[0038] Figure 14 A schematic structural diagram of a sound-generating device according to an exemplary embodiment of the present application is shown;

[0039] Figure 15 A schematic structural diagram of a sound-generating device according to an exemplary embodiment of the present application is shown; and

[0040] Figure 16 A schematic structural diagram of an electronic device according to an exemplary embodiment of the present application is shown. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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) with the height direction. In addition, the X direction, Y direction, and Z direction in each figure include not only the directions indicated by the arrows, but also the directions away from the arrows. 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.

[0048] 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.

[0049] 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 effectively offset in the far field, thereby affecting the sound leakage prevention effect of the sound-emitting devices.

[0050] 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 plurality of voice coils 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.

[0051] 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 the head-mounted device as 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 the first and second temples being 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.

[0052] 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 8 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.

[0053] refer to Figures 1 to 4 、 Figure 7 as well as Figure 9 The sound-generating device 100 may include a vibration assembly 110, multiple voice coils 120, multiple magnetic circuit systems 130, and a connector 140. The vibration assembly 110 may include a first diaphragm 111 and a second diaphragm 112, and the first diaphragm 111 and the second diaphragm 112 may be spaced apart in a first direction. Each voice coil 120 may include a first portion 121 and a second portion 122, and 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. Each magnetic circuit system 130 may include a first magnetic gap 135 and a second magnetic gap 136. The first portions 121 of the multiple voice coils 120 may be respectively located in the first magnetic gaps 135 of the multiple magnetic circuit systems 130, and the second portions 122 of the multiple voice coils 120 may be respectively located in the second magnetic gaps 136 of the multiple magnetic circuit systems 130. Furthermore, the vibration direction of the first portions 121 of the plurality of voice coils 120 driven by the magnetic circuit system 130 may be the same as the vibration direction of the second portions 122 of the plurality of voice coils 120 driven by the magnetic circuit system 130. The connector 140 may be used to connect the plurality of voice coils 120.

[0054] Under the action of the magnetic circuit system 130, the first and second portions 121, 122 of the multiple voice coils 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 synchronizing vibrations of the first and second diaphragms 111, 112 help ensure the consistency of sound radiated forward and backward by the sound-emitting device 100. This effectively short-circuits and cancels out the forward and backward radiated sounds in the far field due to the 180° phase difference, thereby enhancing the sound leakage prevention effect of the sound-emitting device 100. Furthermore, the provision of the connector 140 further ensures the consistency of the synchronizing vibrations of the multiple voice coils 120, further enhancing 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" can be the direction indicated by the arrow in the Z direction, and "forward" can be the direction opposite to the direction indicated by the arrow in the Z direction.

[0055] In an exemplary embodiment, reference Figure 2 、 Figure 3 and Figure 7, the number of magnetic circuit systems 130 in the second direction is the same as the number of voice coils 120. In other words, in the second direction, one voice coil 120 corresponds to one magnetic circuit system 130.

[0056] 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 two magnetic circuit systems 130 in the second direction may include a first magnetic circuit system 1301 corresponding to the first voice coil 1201 and a second magnetic circuit system 1302 corresponding to the second voice coil 1202 ( Figure 12 ). Further, the two voice coils 120 may be symmetrically arranged.

[0057] 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 four magnetic circuit systems 130 in the second direction may include a first magnetic circuit system 1301 corresponding to the first voice coil 1201, a second magnetic circuit system 1302 corresponding to the second voice coil 1202, a third magnetic circuit system 1303 corresponding to the third voice coil, and a fourth magnetic circuit system 1304 corresponding to the fourth voice coil ( Figure 13 ).

[0058] 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.

[0059] It should be understood that the number of two or four voice coils 120 is merely 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.

[0060] 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.

[0061] In an exemplary embodiment, reference Figure 5 The sound-generating device 100 may further include a voice coil support plate 123. The voice coil support plate 123 may be disposed within the cavity defined by the voice coil 120. Furthermore, the voice coil support plate 123 may be disposed in the middle region of the aforementioned 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 corresponds to the number of voice coils 120. In other words, each voice coil 120 corresponds to one voice coil support plate 123.

[0062] Furthermore, the voice coil support plate 123 may be provided with a plurality of openings 1231 spaced apart in a third direction. The openings 1231 extend through the voice coil support plate 123 along the second direction, or the openings 1231 extend through at least a portion of the voice coil support plate 123 along the second direction, wherein the third direction intersects the second direction and the first direction. Providing a voice coil support plate 123 with openings 1231 minimizes the mass of the voice coil 120, thereby improving the sound pressure level of the sound-generating device 100.

[0063] 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 corresponds to 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.

[0064] In an exemplary embodiment, reference Figure 6A connector 140 may be provided between two adjacent voice coils 120. The connector 140 may extend along the second direction, with one end of the connector 140 along the second direction connected to one of the two adjacent voice coils 120, and the other end connected to the other of the two adjacent voice coils 120. For example, one end of the connector 140 along the second direction may be connected to the first voice coil 1201, and the other end may be connected to the second voice coil 1202. The connector 140 may be made of a lightweight material and may be cylindrical in shape.

[0065] As an example, four connectors 140 may be provided between two adjacent voice coils 120. The four connectors 140 may respectively connect four diagonal portions of the two adjacent voice coils 120. Providing multiple (e.g., four) connectors 140 between two adjacent voice coils 120 further ensures the consistency of the unidirectional vibration of the two adjacent voice coils 120, thereby improving the sound leakage prevention effect of the sound-generating device 100.

[0066] It should be understood that the number of four connecting parts 140 between two adjacent voice coils 120 is merely exemplary. The number of connecting parts 140 between two adjacent voice coils 120 can be adjusted according to actual needs. This application does not impose any specific restrictions on the number of connecting parts 140 between two adjacent voice coils 120.

[0067] In an exemplary embodiment, reference Figure 7 、 Figure 9 、 Figure 11 、 Figure 12 and Figure 13 The 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.

[0068] In an exemplary embodiment, reference Figure 7 、 Figure 9 、 Figure 11 、 Figure 12 and Figure 13Magnetic 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.

[0069] In an exemplary embodiment, reference Figure 7 、 Figure 9 、 Figure 11 、 Figure 12 and Figure 13 The magnetic circuit system 130 may include a first central magnet 131, a second central magnet 132, and side magnets 133. 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 be between the first central magnet 131 and the first diaphragm 111, and a predetermined distance may be between the second central magnet 132 and the second diaphragm 112. In other words, the first central magnet 131 does not contact the first diaphragm 111, and the second central magnet 132 does not contact the second diaphragm 112. The side magnet 133 may be located to one side 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 side magnet 133 and the first central magnet 131, and a second magnetic gap 136 may be formed between the side magnet 133 and the second central magnet 132.

[0070] A predetermined distance may be maintained between the first portion 121 of the voice coil 120 and the first central magnet 131 and the side magnets 133. A predetermined distance may be maintained between the second portion 122 of the voice coil 120 and the second central magnet 132 and the side magnets 133. In other words, the first portion 121 of the voice coil 120 does not contact the first central magnet 131 and the side magnets 133, and the second portion 122 of the voice coil 120 does not contact the second central magnet 132 and the side magnets 133.

[0071] In an exemplary embodiment, reference Figure 7 、 Figure 9 、 Figure 11 、 Figure 12 and Figure 13The side magnet 133 may have a first end close to the first central magnet 131 and a second end close to the second central magnet 132. The first end may have a first magnetic pole, and the second end may have a second magnetic pole, and the magnetism of the first magnetic pole and the magnetism of the second magnetic pole may be opposite. The magnetic pole of the first central magnet 131 close to the first diaphragm 111 may have opposite magnetism to the first magnetic pole, and the magnetic pole of the first central magnet 131 away from the first diaphragm 111 may have the same magnetism as the first magnetic pole. The magnetic pole of the second central magnet 132 close to the second diaphragm 112 may have opposite magnetism to the second magnetic pole, and the magnetic pole of the second central magnet 132 away from the second diaphragm 112 may have the same magnetism as the second magnetic pole.

[0072] For example, the first magnetic pole may be a south pole (S pole), the second magnetic pole may be a north pole (N pole), the magnetic pole of the first central magnet 131 close to the first diaphragm 111 may be an N pole, and the magnetic pole of the first central magnet 131 away from the first diaphragm 111 may be an S pole. The magnetic pole of the second central magnet 132 close to the second diaphragm 112 may be an S pole, and the magnetic pole of the second central magnet 132 away from the second diaphragm 112 may be an N pole.

[0073] For another example, the first magnetic pole 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 diaphragm 111 may be an S pole, and the magnetic pole of the first central magnet 131 away from the first diaphragm 111 may be an N pole. The magnetic pole of the second central magnet 132 close to the second diaphragm 112 may be an N pole, and the magnetic pole of the second central magnet 132 away from the second diaphragm 112 may be an S pole.

[0074] The first central magnet 131 and the side magnets 133 form first magnetic lines of force near the first magnetic gap 135, and the second central magnet 132 and the side magnets 133 form second magnetic lines of force near the second magnetic gap 136. The first and second magnetic lines of force are directed in opposite directions. When an audio current is input to the voice coil 120, the Ampere force exerted on the first portion 121 of the voice coil 120 in the first magnetic gap 135 is directed in the same direction as the Ampere force exerted on the second portion 122 of the voice coil 120 in the second magnetic gap 136. This allows the first and second portions 121, 122 of the voice coil 120 to vibrate in the same direction, thereby driving the first and second diaphragms 111, 112 to vibrate in the same direction. This ensures consistent sound radiation from the sound device 100 both forward and backward, and enhances the sound leakage prevention effect of the sound device 100.

[0075] In an exemplary embodiment, reference Figure 7 、 Figure 9 、 Figure 11 、 Figure 12 and Figure 13The first portion 121 of the voice coil 120 may be located in the portion of the first magnetic gap 135 close to the first diaphragm 111, and the second portion 122 of the voice coil 120 may be located in the portion of the second magnetic gap 136 close to the second diaphragm 112. By locating the first portion 121 of the voice coil 120 in the portion of the first magnetic gap 135 close to the first diaphragm 111 and the second portion 122 of the voice coil 120 in the portion of the second magnetic gap 136 close to the second diaphragm 112, the first and second magnetic lines of force can act more on the first and second portions 121, 122 of the voice coil 120, thereby improving the sound production efficiency of the sound-producing device 100.

[0076] In an exemplary embodiment, reference Figure 7 、 Figure 9 、 Figure 11 and Figure 12 For multiple magnetic circuit systems 130 in the second direction, the directions of the first magnetic force lines of the multiple magnetic circuit systems 130 (for example, the first magnetic circuit system 1301 and the second magnetic circuit system 1302) can be opposite, and the directions of the second magnetic force lines can be opposite. The magnetic properties of the first magnetic poles of the edge magnets 133 of the multiple magnetic circuit systems 130 (for example, the first magnetic circuit system 1301 and the second magnetic circuit system 1302) can be the same, and the magnetic properties of the second magnetic poles can be the same.

[0077] For example, for the first magnetic circuit system 1301 and the second magnetic circuit system 1302, the first magnetic pole of the side magnet 133 can be the S pole, and the second magnetic pole of the side magnet 133 can be the N pole; the magnetic pole of the first central magnet 131 close to the first diaphragm 111 can be the N pole, and the magnetic pole of the first central magnet 131 away from the first diaphragm 111 can be the S pole; the magnetic pole of the second central magnet 132 close to the second diaphragm 112 can be the S pole, and the magnetic pole of the second central magnet 132 away from the second diaphragm 112 can be the N pole.

[0078] As an example, the first central magnets 131 and second central magnets 132 of two adjacent magnetic circuit systems 130 may be connected. In other words, the first central magnets 131 and second central magnets 132 of two adjacent magnetic circuit systems 130 may be integrally formed. For example, the first central magnets 131 and second central magnets 132 of the first magnetic circuit system 1301 and the second magnetic circuit system 1302 may be integrally formed, and the side magnets 133 of the first magnetic circuit system 1301 and the second magnetic circuit system 1302 may be integrally formed, respectively.

[0079] Audio current is input to the first voice coil 1201 and the second voice coil 1202, and the current directions of the first voice coil 1201 and the second voice coil 1202 are opposite, that is, the current directions of the first parts 121 of the first voice coil 1201 and the second voice coil 1202 are opposite, and the current directions of the second parts 122 of the first voice coil 1201 and the second voice coil 1202 are opposite. This can make the Ampere force acting on the first parts 121 and the second parts 122 of the multiple voice coils have the same direction, realize the same-directional vibration of the multiple voice coils, ensure the consistency of the sound radiation of the sound-emitting device 100 to the front and rear, improve the sound leakage prevention effect of the sound-emitting device 100, and at the same time increase the amplitude of the first diaphragm 111 and the second diaphragm 112, and improve the sound pressure level of the sound-emitting device 100.

[0080] In an exemplary embodiment, reference Figure 13 For multiple magnetic circuit systems 130 in the second direction, the directions of the first magnetic lines of force of two adjacent magnetic circuit systems 130 may be opposite, and the directions of the second magnetic lines of force may be opposite. For example, 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. For another example, for the second magnetic circuit system 1302 and the third magnetic circuit system 1303, 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. For another example, for the third magnetic circuit system 1303 and the fourth magnetic circuit system 1304, 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.

[0081] As an example, the first magnetic poles and second magnetic poles of the edge magnets 133 of multiple magnetic circuit systems 130 in the second direction may have the same magnetism. For example, the first magnetic poles and second magnetic poles of the edge magnets 133 of the first magnetic circuit system 1301, the second magnetic circuit system 1302, the third magnetic circuit system 1303, and the fourth magnetic circuit system 1304 may have the same magnetism.

[0082] As an example, for at least two adjacent magnetic circuit systems 130, the first central magnets 131 of the two magnetic circuit systems 130 may be connected (e.g., as a one-piece structure), the second central magnets 132 of the two magnetic circuit systems 130 may be connected (e.g., as a one-piece structure), and the side magnets of the two magnetic circuit systems 130 are located on opposite sides of the first central magnet 131 along the second direction. For example, the first central magnets 131 of the first magnetic circuit system 1301 and the second magnetic circuit system 1302 may be one-piece structures, and the second central magnets 132 may be one-piece structures. For another example, the first central magnets 131 of the third magnetic circuit system 1303 and the fourth magnetic circuit system 1304 may be one-piece structures, and the second central magnets 132 may be one-piece structures.

[0083] As an example, the side magnets 133 of at least two adjacent magnetic circuit systems 130 may be connected. For example, the side magnets 133 of the second magnetic circuit system 1302 and the third magnetic circuit system 1303 are an integrated structure, that is, the second magnetic circuit system 1302 and the third magnetic circuit system 1303 share one side magnet 133.

[0084] As an example, the current directions of two adjacent voice coils 120 are opposite. For example, the current directions of the first voice coil 1201 and the second voice coil 1202 are opposite, the current directions of the second voice coil 1202 and the third voice coil are opposite, and the current directions of the third voice coil and the fourth voice coil are opposite.

[0085] 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.

[0086] 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.

[0087] In an exemplary embodiment, reference Figure 7 、 Figure 9 and Figure 10 , the magnetic circuit system 130 may further include a magnetic circuit support plate 134. The magnetic circuit support plate 134 may be disposed between the first center magnet 131 and the second center magnet 132. One end of the magnetic circuit support plate 134 contacts the first center magnet 131, and the other end contacts the second center magnet 132. The magnetic circuit support plate 134 may be a magnetic conductive plate. For example, the magnetic circuit support plate 134 may be made of a magnetic conductive material having good magnetic conductivity. The magnetic conductive material may include, but is not limited to, silicon steel. By setting the magnetic circuit support plate 134 as a magnetic conductive plate, it can not only support the first center magnet 131 and the second center magnet 132, but also effectively connect the magnetic circuits of the first center magnet 131 and the second center magnet 132.

[0088] In an exemplary embodiment, reference Figure 7 、 Figure 9 and Figure 10The magnetic circuit system 130 may further include a first magnetic conductive sheet 1311, a second magnetic conductive sheet 1321, and a third magnetic conductive sheet 1331. The first magnetic conductive sheet 1311 may be disposed on a side of the first central magnet 131 close to the first diaphragm 111. The second magnetic conductive sheet 1321 may be disposed on a side of the second central magnet 132 close to the second diaphragm 112. The third magnetic conductive sheet 1331 may be disposed on a side of the side magnet 133 along the first direction.

[0089] As an example, the number of the third magnetic conductive sheets 1331 is two, and the two third magnetic conductive sheets 1331 are respectively disposed on two opposite sides of the side magnet 133 along the first direction.

[0090] By setting the first magnetic conductive sheet 1311, the second magnetic conductive sheet 1321 and the third magnetic conductive sheet 1331, the tip effect can be used to better converge the first magnetic lines of force at the position of the first magnetic gap and the second magnetic lines of force at the position of the second magnetic gap, thereby improving the sound efficiency of the sound device 100.

[0091] In an exemplary embodiment, reference Figure 10 The first center magnet 131, the second center magnet 132, and the side magnet 133 can all extend along the third direction and extend to a preset length. The extension length of the first center magnet 131, the second center magnet 132, and the side magnet 133 in the third direction can be adaptively adjusted according to the extension length of the voice coil 120 in the third direction. By ensuring that the first center magnet 131, the second center magnet 132, and the side magnet 133 have a larger extension length in the third direction, each voice coil 120 can vibrate in the same direction at different positions in the third direction, and the amplitude of the first diaphragm 111 and the second diaphragm 112 can be increased, thereby improving the sound pressure level of the sound-generating device 100.

[0092] In an exemplary embodiment, reference Figure 8 and Figure 9 The sound-generating device 100 may further include a first housing 150, a first fold 160, and a second fold 170. The first fold 160 may be used to connect the first diaphragm 111 to the first housing 150. The second fold 170 may be used to connect the second diaphragm 112 to the first housing 150. By providing the first fold 160 and the second fold 170, the sound-generating device 100 may have two 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.

[0093] As an example, the magnetic circuit support plate 134 may extend along the third direction, and both ends of the magnetic circuit support plate 134 along the third direction are respectively connected to the first housing 150 .

[0094] As an example, the third magnetic conductive sheets 1331 on two opposite sides of the side magnet 133 along the first direction may be connected to the first housing 150 respectively.

[0095] Furthermore, when the sound-generating device 100 has only one surround in the vibration direction (e.g., the first direction), polarization occurs when the first and second diaphragms 111, 112 vibrate in the first direction at a large amplitude, resulting in noise. To avoid this noise, the amplitudes of the first and second diaphragms 111, 112 must be designed to be very small, failing to provide a high sound pressure level. When the sound-generating device 100 has two surrounds in the vibration direction (e.g., the first direction), the voice coil 120 and / or magnetic circuit system 130 can be designed to provide a larger amplitude, thereby displacing more surrounding air and providing a higher sound pressure level.

[0096] 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). Together with the above-mentioned two 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.

[0097] In an exemplary embodiment, reference Figure 14 and Figure 15 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.

[0098] The first cover plate 181 and the first diaphragm 111 may define a first cavity. The second cover plate 182 and the second diaphragm 112 may define a second cavity. The third cover plate 183 may be provided with a first sound outlet hole 1831, which may communicate with the first cavity. The fourth cover plate 184 may be provided with a second sound outlet hole 1841, which may communicate with the second cavity.

[0099] 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 positioning the first sound outlet 1831 as far away from the user's ear as possible, near-field phase cancellation can be reduced.

[0100] 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.

[0101] 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 and the second cavity in the first direction are substantially the same. By controlling the heights of the first cavity and the second cavity 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.

[0102] 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.

[0103] Figure 16 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 16 A sound-generating device is installed in area I.

[0104] 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 plurality of voice coils, the plurality of voice coils being spaced apart in a second direction intersecting the first direction, each of the voice coils comprising a first portion and a second portion, the first portion being connected to the first diaphragm, and the second portion being connected to the second diaphragm; A connecting member, used for connecting a plurality of the voice coils; as well as a plurality of magnetic circuit systems, each of the magnetic circuit systems comprising a first magnetic gap and a second magnetic gap; The first parts of the plurality of voice coils are respectively located in the first magnetic gaps of the plurality of magnetic circuit systems, the second parts of the plurality of voice coils are respectively located in the second magnetic gaps of the plurality of magnetic circuit systems, and the vibration direction of the first parts of the plurality of voice coils under the drive of the magnetic circuit system is the same as the vibration direction of the second parts of the plurality of voice coils under the drive of the magnetic circuit system.

2. The sound-generating device according to claim 1, 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 The side magnet is located on one side of the first central magnet and the second central magnet along the second direction, the first magnetic gap is formed between the side magnet and the first central magnet, and the second magnetic gap is formed between the side magnet and the second central magnet.

3. The sound-generating device according to claim 2, characterized in that: The 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, the magnetism of the first magnetic pole is opposite to the magnetism of the second magnetic pole; The magnetic pole of the first central magnet close to the first diaphragm has a magnetic property opposite to that of the first magnetic pole, and the magnetic pole of the first central magnet away from the first diaphragm has a magnetic property identical to that of the first magnetic pole; and The magnetic pole of the second central magnet close to the second diaphragm has opposite magnetic properties to the second magnetic pole, and the magnetic pole of the second central magnet far from the second diaphragm has the same magnetic properties as the second magnetic pole.

4. The sound-generating device according to claim 2, characterized in that: The first portion of the voice coil is located in a portion of the first magnetic gap close to the first diaphragm, and the second portion of the voice coil is located in a portion of the second magnetic gap close to the second diaphragm.

5. The sound-generating device according to claim 2, 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 magnetic conductive plate.

6. The sound-generating device according to claim 2, characterized in that: The magnetic circuit system further comprises: a first magnetic conductive sheet, disposed on a side of the first central magnet close to the first diaphragm; a second magnetic conductive sheet, disposed on a side of the second central magnet close to the second diaphragm; and The third magnetic conductive sheet is arranged on one side of the edge magnet along the first direction.

7. The sound-generating device according to claim 6, characterized in that: The magnetic circuit system includes two third magnetic conductive sheets, and the two third magnetic conductive sheets are respectively arranged on two opposite sides of the edge magnet along the first direction.

8. The sound-generating device according to claim 3, characterized in that: In the second direction, the first magnetic poles of the edge magnets of the plurality of magnetic circuit systems have the same magnetic properties, and the second magnetic poles have the same magnetic properties.

9. The sound-generating device according to claim 3, characterized in that: In the second direction, the first central magnets of at least two adjacent magnetic circuit systems are connected, and the second central magnets are connected.

10. The sound-generating device according to claim 2, characterized in that: There are two voice coils; in the second direction, the first central magnets of the two magnetic circuit systems are connected, the second central magnets are connected, and the side magnets of the two magnetic circuit systems are respectively located on opposite sides of the first central magnet along the second direction.

11. The sound-generating device according to claim 5, characterized in that: 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.

12. The sound-generating device according to claim 11, characterized in that: The voice coil support plate is provided with a plurality of openings spaced apart in a third direction, the openings passing through the voice coil support plate along the second direction, or the openings passing through at least a portion of the voice coil support plate along the second direction, wherein the third direction intersects with the second direction and the first direction.

13. 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 first fold ring, used to connect the first diaphragm and the first shell; and The second fold ring is used to connect the second diaphragm and the first shell.

14. 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.

15. The sound-generating device according to any one of claims 1 to 12, characterized in that: The connecting member extends along the second direction, and one end of the connecting member along the second direction is connected to one of the two adjacent voice coils, and the other end of the connecting member is connected to the other of the two adjacent voice coils.

16. The sound-generating device according to any one of claims 1 to 12, characterized in that: The number of the magnetic circuit systems in the second direction is the same as the number of the voice coils.

17. The sound-generating device according to any one of claims 1 to 12, 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.

18. The sound-generating device according to any one of claims 1 to 12, 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.

19. An electronic device, characterized in that: The device comprises the sound-generating device according to any one of claims 1 to 18.

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