Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment. The sound production device comprises a vibration assembly, a voice coil and a 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 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 magnetic circuit system comprises a first magnetic gap and a second magnetic gap, the first part is located in the first magnetic gap, the second part is located in the second magnetic gap, and the magnetic circuit system is used for driving the first part and the second part to vibrate in the same direction and driving the first vibrating diaphragm and the second vibrating diaphragm to vibrate in the same direction.

Description

Technical Field

[0001] This application relates to the field of electronic product technology, specifically to a sound-generating device and an electronic device. Background Technology

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

[0003] Sound-generating devices can include single-sided and double-sided sound-generating devices. The sound pressure level of a double-sided sound-generating device is higher than that of a single-sided sound-generating device, and it can reduce vibration when the device is in operation. However, existing double-sided sound-generating devices have poor consistency in radiating sound forward and backward, and their sound leakage prevention effect is relatively poor. Summary of the Invention

[0004] A first aspect of this application provides a sound-generating device, which includes a vibrating assembly, a voice coil, and a magnetic circuit system. The vibrating assembly includes a first diaphragm and a second diaphragm spaced apart in a first direction. The voice coil includes 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 magnetic circuit system includes a first magnetic gap and a second magnetic gap, the first portion being located in the first magnetic gap and the second portion being located in the second magnetic gap; the magnetic circuit system is used to drive the first portion and the second portion to vibrate in the same direction, and to drive the first diaphragm and the second diaphragm to vibrate in the same direction.

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

[0006] According to an exemplary embodiment of this application, the magnetic circuit system has a plurality of first magnetic gaps and a plurality of second magnetic gaps, with the first portions of a plurality of voice coils respectively located in the plurality of first magnetic gaps and the second portions of a plurality of voice coils respectively located in the plurality of second magnetic gaps.

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

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

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

[0010] According to an exemplary embodiment of this application, both the first and second side magnets have a first end near the first central magnet and a second end near the second central magnet. The first end has a first magnetic pole, and the second end has a second magnetic pole. The magnetic properties of the first and second magnetic poles are opposite. The magnetic pole of the first central magnet near the first side magnet is opposite to the magnetic properties of the first side magnet, and the magnetic pole of the second central magnet near the first side magnet is opposite to the magnetic properties of the second side magnet. Similarly, the magnetic pole of the first central magnet near the second side magnet is opposite to the magnetic properties of the first and second side magnets, and the magnetic pole of the second central magnet near the second side magnet is opposite to the magnetic properties of the second side magnet.

[0011] According to an exemplary embodiment of this application, 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.

[0012] According to an exemplary embodiment of this application, 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 magnetic properties, and the first magnetic poles of the second side magnets of two adjacent magnetic circuit systems have opposite magnetic properties.

[0013] According to an exemplary embodiment of this application, there are multiple first central magnets, which are located between first and second side magnets and spaced apart in a second direction. There are also multiple second central magnets, which are located between first and second side magnets and spaced apart in a 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 this application, a first central magnet and a second central magnet have third and fourth ends disposed opposite to each other in a second direction. The magnetic poles at the third ends of the plurality of first central magnets are identical in magnetism, and the magnetic poles at the fourth ends are identical in magnetism. Similarly, the magnetic poles at the third ends of the plurality of second central magnets are identical in magnetism, and the magnetic poles at the fourth ends are identical in magnetism.

[0015] According to an exemplary embodiment of this 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 this application, in a third direction, there are multiple magnetic circuit systems, and the multiple magnetic circuit systems are spaced apart along the third direction, wherein the third direction intersects with the first direction and the second direction.

[0017] According to an exemplary embodiment of this application, the first magnetic poles of the first side magnets of the third-party upward multiple magnetic circuit systems have the same magnetism, and the first magnetic poles of the second side magnets have the same magnetism.

[0018] According to an exemplary embodiment of this application, a first central magnet of a plurality of magnetic circuit systems facing the third party is spaced apart, a second central magnet is spaced apart, a first side magnet is spaced apart, and a second side magnet is spaced apart.

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

[0020] According to an exemplary embodiment of this application, the voice coil is ring-shaped. The sound-generating device also includes a voice coil support plate disposed in the cavity defined by the voice coil.

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

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

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

[0024] According to an exemplary embodiment of this application, the sound-generating device further includes a second housing, which includes a first cover plate, a second cover plate, a third cover plate, and a fourth cover plate. The third cover plate connects the first cover plate and the second cover plate, and the fourth cover plate connects the first cover plate and the second cover plate. The first cover plate and a first diaphragm define a first cavity. The second cover plate and a second diaphragm define a second cavity. The third cover plate has a first sound outlet hole communicating with the first cavity. The fourth cover plate has a second sound outlet hole communicating with the second cavity.

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

[0026] According to an exemplary embodiment of this 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 this application, the sound-generating device further includes a first coupling member and a second coupling member. The first coupling member is disposed on a 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 a second portion of the voice coil and is used to connect the second portion to the second diaphragm.

[0028] A second aspect of this application provides an electronic device that includes a sound-generating device as described in the first aspect of this application.

[0029] In some embodiments of this application, the vibration component 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 connected to the first diaphragm. The second part of the voice coil is located in the second magnetic gap of the magnetic circuit system and 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 sound radiation from the sound-generating device to the front and rear, and improving the sound leakage prevention effect of the sound-generating device. Attached Figure Description

[0030] Other features, objects, and advantages involved in the embodiments of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Wherein:

[0031] Figure 1 A schematic diagram of the structure of a sound-generating device according to an exemplary embodiment of this application is shown;

[0032] Figure 2 A schematic diagram of the structure of a sound-generating device according to an exemplary embodiment of this application is shown;

[0033] Figure 3 It shows Figure 2 A top view of the sound-generating device;

[0034] Figure 4 It shows Figure 2 A front view of the sound-generating device;

[0035] Figure 5 A schematic diagram of the structure of a voice coil according to an exemplary embodiment of this application is shown;

[0036] Figure 6 A schematic diagram of the structure of a sound-generating device according to an exemplary embodiment of this application is shown;

[0037] Figure 7 It shows Figure 6 A schematic diagram of the cross-section of the sound-generating device;

[0038] Figure 8 A schematic diagram of a magnetic circuit system according to an exemplary embodiment of this application is shown;

[0039] Figure 9 A schematic diagram of a magnetic circuit system according to an exemplary embodiment of this application is shown;

[0040] Figure 10 A schematic diagram of a magnetic circuit system according to an exemplary embodiment of this application is shown;

[0041] Figure 11 A schematic diagram of a magnetic circuit system according to an exemplary embodiment of this application is shown;

[0042] Figure 12 It shows Figure 6 A schematic diagram of the cross-section of the sound-generating device;

[0043] Figure 13 It shows Figure 6 A schematic diagram of the cc cross-section of the sound-generating device;

[0044] Figure 14 A schematic diagram of the structure of a sound-generating device according to an exemplary embodiment of this application is shown;

[0045] Figure 15 A schematic diagram of the structure of a sound-generating device according to an exemplary embodiment of this application is shown;

[0046] Figure 16 It shows Figure 14 A schematic diagram of the dd section; and

[0047] Figure 17 A schematic diagram of the structure of an electronic device according to an exemplary embodiment of this application is shown. Detailed Implementation

[0048] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this 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 terms "first," "second," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first diaphragm discussed below may be referred to as the second diaphragm.

[0050] In the accompanying drawings, the thickness, dimensions, and shapes of the components may have been slightly exaggerated for ease of illustration. The drawings are for illustrative purposes only and are not drawn to scale.

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

[0052] Unless otherwise specified, all terms used in this application (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) should be understood to have a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless expressly so defined in this application.

[0053] It should be noted that, where there is no conflict, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0054] It should be noted that, in the following text, the first direction may be simply referred to as the Z direction, the second direction as the Y direction, and the third direction as the X direction. The X, Y, and Z directions in the accompanying drawings illustrate the spatial relationships of the components in the sound-generating device. For example, the Z direction is the height direction of the sound-generating device, and the X and Y directions are two directions that intersect (e.g., are perpendicular) to each other on a plane that intersects (e.g., is perpendicular) to the height direction. Furthermore, the X, Y, and Z directions in the accompanying drawings 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, Y, and Z directions are not restrictive. The same concepts will be used throughout this application to describe the spatial relationships of the components in the sound-generating device.

[0055] The sound-generating device may include two diaphragms, a voice coil, and a magnetic circuit system. When an alternating audio current is input to the voice coil, under the action of the magnetic circuit system, the voice coil is subjected to an alternating driving force, producing alternating motion, which drives the two diaphragms to vibrate, repeatedly pushing the surrounding air to produce sound. When the sound-generating device is working, it radiates sound both forward and backward simultaneously, with the sound radiated forward and backward differing in phase by 180°. In the far field, the sound radiated forward and backward cancel each other out due to the 180° phase difference.

[0056] However, existing sound-generating devices have poor consistency in radiating sound forward and backward. The sound radiated forward and backward by the sound-generating device has a large difference in the far field and cannot be well antiphased and canceled in the far field, thus affecting the sound leakage prevention effect of the sound-generating device.

[0057] In order to at least partially solve one or more of the above-mentioned problems and other potential problems, the first aspect of this application proposes a sound-generating device, specifically, a sound-generating device in which the first and second parts of a voice coil vibrate in the same direction, thereby driving the first and second diaphragms to vibrate in the same direction, so as to ensure the consistency of sound radiation from the sound-generating device to the front and rear.

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

[0059] Figure 1 This is a schematic diagram of the structure of a sound-generating device according to an exemplary embodiment of this application. Figure 2This is a schematic diagram of the structure of a sound-generating device (vibration component not shown) according to an exemplary embodiment of this application. Figure 6 This is a schematic diagram of the structure of a sound-generating device (showing a first housing) according to an exemplary embodiment of this application. Figure 14 and Figure 15 These are schematic diagrams of the structure of a sound-generating device (showing a second housing) according to an exemplary embodiment of this application.

[0060] refer to Figures 1 to 4 , Figure 7 as well as Figure 8 The sound-generating device 100 may include a vibrating assembly 110, a voice coil 120, and a magnetic circuit system 130. The vibrating assembly 110 may include a first diaphragm 111 and a second diaphragm 112, which may be spaced apart in a first direction. The voice coil 120 may include a first portion 121 and a second portion 122, where 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. The magnetic circuit system 130 can be used to drive the first portion 121 and the second portion 122 of the voice coil 120 to vibrate in the same direction, and to drive the first diaphragm 111 and the second diaphragm 112 to vibrate in the same direction.

[0061] The first part 121 of the voice coil 120 is located in the first magnetic gap 135 of the magnetic circuit system 130 and connected to the first diaphragm 111. The second part 122 of the voice coil 120 is located in 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 part 121 and the second part 122 of the voice coil 120 vibrate in the same direction, which in turn drives the first diaphragm 111 and the second diaphragm 112 to vibrate in the same direction, thereby resonating with the surrounding air to produce sound. The co-directional vibration of the first diaphragm 111 and the second diaphragm 112 helps to ensure the consistency of the sound radiated forward and backward by the sound-generating device 100. This allows the sound radiated forward and the sound radiated backward to be effectively short-circuited and canceled out in the far field due to a 180° phase difference, thus improving the sound leakage prevention effect of the sound-generating device 100. The vibration direction of the first diaphragm 111 and the second diaphragm 112 can be parallel to the first direction. It should be noted that "behind" can be the direction indicated by the arrow in the Z direction, while "forward" can be the opposite direction to the direction indicated by the arrow in the Z direction.

[0062] In an exemplary implementation, reference Figure 5The voice coil 120 may be ring-shaped. The voice coil 120 may extend on a plane formed by a first direction and a 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 to the voice coil 120, the voice coil 120 may be subjected to an alternating driving force to generate alternating motion, thereby causing 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 implementation, 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. Further, the voice coil support plate 123 may be disposed in the middle region of the cavity. One side of the voice coil support plate 123 may be connected to the first part 121 of the voice coil 120, and the other side may be connected to the second part 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 one voice coil support plate 123. By providing the voice coil support plate 123, the voice coil 120 can be supported and shaped.

[0064] In an exemplary implementation, reference Figure 5 The sound-generating device 100 may further include a first coupling 124 and a second coupling 125. The first coupling 124 may be disposed on the first portion 121 of the voice coil 120 and is used to connect the first portion 121 to the first diaphragm 111. The second coupling 125 may be disposed on the second portion 122 of the voice coil 120 and is used to connect the second portion 122 to the second diaphragm 112. The number of first couplings 124 and second couplings 125 is the same as the number of voice coils 120. In other words, each voice coil 120 corresponds to one first coupling 124 and one second coupling 125. By providing the first coupling 124 and the second coupling 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 implementation, reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11The direction of the Ampere force on the first part 121 of the voice coil 120 in the first magnetic gap 135 can be the same as the direction of the Ampere force on the second part 122 of the voice coil 120 in the second magnetic gap 136. By controlling the direction of the Ampere force on the first part 121 and the second part 122 of the voice coil 120 to be the same, the first part 121 and the second part 122 of the voice coil 120 can vibrate in the same direction, thereby driving the first diaphragm 111 and the second diaphragm 112 to vibrate in the same direction, realizing the consistency of the sound radiating device 100 in the forward and backward directions, and improving the sound leakage prevention effect of the sound radiating device 100.

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

[0067] As an example, the number of voice coils 120 may be two, and the two voice coils 120 are 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 Furthermore, the two voice coils 120 can be set symmetrically.

[0068] As an example, the number of voice coils 120 may be three, 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). Correspondingly, 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, with the four voice coils 120 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). Correspondingly, 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 first portions 121 of the multiple voice coils 120 experience Ampere forces in the same direction in the first magnetic gap 135, and the second portions 122 of the multiple voice coils 120 experience Ampere forces in the same direction in the second magnetic gap 136. By controlling the direction of the Ampere forces experienced by the first portions 121 and the second portions 122 of the multiple voice coils 120 to be the same, it is possible to ensure that the multiple voice coils 120 vibrate in the same direction, increase the amplitude of the first diaphragm 111 and the second diaphragm 112, thereby increasing the sound pressure level of the sound generating device 100.

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

[0072] In an exemplary implementation, reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 The magnetic circuit system 130 can form a first magnetic line of force near the first magnetic gap 135 and a second magnetic line of force near the second magnetic gap 136, with the first and second magnetic lines of force in opposite directions. When the voice coil 120 receives an audio current, since the current direction of the first part 121 is opposite to that of the second part 122, the direction of the Ampere force on the first part 121 in the first magnetic gap 135 is the same as the direction of the Ampere force on the second part 122 in the second magnetic gap 136. The first part 121 and the second part 122 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 from the sound-generating device 100 to the front and rear, and improving the sound leakage prevention effect of the sound-generating device 100.

[0073] In an exemplary implementation, 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 lateral magnet 133, and a second lateral 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 a 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, and the second central magnet 132 and the second diaphragm 112 are not in contact. The first lateral magnet 133 and the second lateral magnet 134 may be located on opposite sides of the first central magnet 131 and the second central magnet 132 along a second direction. A first magnetic gap 135 may be formed between the first lateral magnet 133, the second lateral magnet 134, and the first central magnet 131, and a second magnetic gap 136 may be formed between the first lateral magnet 133, the second lateral magnet 134, and the second central magnet 132.

[0074] The first part 121 of the voice coil 120 can be at a predetermined distance from the first center magnet 131, the first side magnet 133, and the second side magnet 134. Similarly, the second part 122 of the voice coil 120 can be at a predetermined distance from the second center magnet 132, the first side magnet 133, and the second side magnet 134. In other words, the first part 121 of the voice coil 120 does not contact the first center magnet 131, the first side magnet 133, or the second side magnet 134, and the second part 122 of the voice coil 120 does not contact the second center magnet 132, the first side magnet 133, or the second side magnet 134.

[0075] In an exemplary implementation, reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 The first lateral magnet 133 may have a first end near the first central magnet 131 and a second end near 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 magnetic properties of the first and second magnetic poles may be opposite. Similarly, the second lateral magnet 134 may have a first end near the first central magnet 131 and a second end near 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 magnetic properties of the first and second magnetic poles may be opposite. The magnetic properties of the first and second magnetic poles of the first lateral magnet 133 and the second lateral magnet 134 may be opposite.

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

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

[0078] For example, the first magnetic pole of the first side magnet 133 can be the N pole and the second magnetic pole can be the S pole; the first magnetic pole of the second side magnet 134 can be the S pole and the second magnetic pole can be the N pole; the magnetic pole of the first central magnet 131 near the first side magnet 133 can be the S pole and the magnetic pole of the first central magnet 131 near the second side magnet 134 can be the N pole; the magnetic pole of the second central magnet 132 near the first side magnet 133 can be the N pole and the magnetic pole of the second central magnet 132 near the second side magnet 134 can be the S pole.

[0079] The first central magnet 131, the first side magnet 133, and the second side magnet 134 can each form a first magnetic field line near the first magnetic gap 135. The second central magnet 132, the first side magnet 133, and the second side magnet 134 can each form a second magnetic field line near the second magnetic gap 136. The directions of the multiple first magnetic field lines are the same, the directions of the multiple second magnetic field lines are the same, and the directions of the first magnetic field lines and the second magnetic field lines are opposite. When an audio current is input to the voice coil 120, the direction of the Ampere force on the first part 121 of the multiple voice coils 120 in the first magnetic gap 135 is the same as the direction of the Ampere force on the second part 122 of the multiple voice coils 120 in the second magnetic gap 136. The first part 121 and the second part 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 the sound radiating device 100 in the forward and backward directions, improving the sound leakage prevention effect of the sound radiating device 100, and at the same time increasing the amplitude of the first diaphragm 111 and the second diaphragm 112, thereby increasing the sound pressure level of the sound radiating device 100.

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

[0081] 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 part 121 of the first voice coil 1201 and the second part 122 of the second voice coil 1202 are the same. This makes the Ampere force on the first part 121 and the second part 122 of the two voice coils in the same direction, realizing the co-directional vibration of the two voice coils. This ensures the consistency of the sound radiating device 100 in the forward and backward directions, improves the sound leakage prevention effect of the sound radiating device 100, and can also increase the amplitude of the first diaphragm 111 and the second diaphragm 112, thereby increasing the sound pressure level of the sound radiating device 100.

[0082] In an exemplary implementation, 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 lines of force of the two magnetic circuit systems 130 can be opposite, and the directions of the second magnetic lines of force can be opposite; the magnetism of the first magnetic poles of the first side magnets 133 of the two magnetic circuit systems 130 can be opposite, and the magnetism 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, 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 field lines may be opposite, and the directions of the second magnetic field lines may be opposite; the magnetism of the first magnetic pole of the first side magnet 133 may be opposite, and the magnetism of the first magnetic pole of the second side magnet 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 can be connected (e.g., as a single unit). 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 are a single unit.

[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 can be opposite. The current directions of the voice coils corresponding to each magnetic circuit system 130 can 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] Inputting audio current into the first voice coil 1201, the second voice coil 1202, the third voice coil, and the fourth voice coil can make the direction of the Ampere force on the first part 121 and the second part 122 of the multiple voice coils the same, so as to realize the same direction of vibration of the multiple voice coils, ensure the consistency of the sound radiating device 100 in front and behind, improve the sound leakage prevention effect of the sound radiating device 100, and at the same time increase the amplitude of the first diaphragm 111 and the second diaphragm 112, thereby increasing the sound pressure level of the sound radiating device 100.

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

[0088] In an exemplary implementation, reference Figure 10 and Figure 11 The number of first central magnets 131 can be multiple, and these multiple first central magnets 131 can be located between the first side magnets 133 and the second side magnets 134 and spaced apart in a second direction. The number of second central magnets 132 can also be multiple, and these multiple second central magnets 132 can be located between the first side magnets 133 and the second side magnets 134 and spaced apart in a second direction. A first magnetic gap 135 can be formed between two adjacent first central magnets 131, and a second magnetic gap 136 can be formed between two adjacent second central magnets 132. A first magnetic field line can be formed near the first magnetic gap 135 between two adjacent first central magnets 131, and a second magnetic field line can be formed near the second magnetic gap 136 between two adjacent second central magnets 132, with the first and second magnetic field lines in opposite directions.

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

[0090] As an example, a first central magnet 131 may have a third end and a fourth end disposed opposite to each other in a second direction. The magnetic poles of the third ends of multiple first central magnets 131 may have the same magnetic properties, and the magnetic poles of the fourth ends may have the same magnetic properties. A second central magnet 132 may have a third end and a fourth end disposed opposite to each other in a second direction. The magnetic poles of the third ends of multiple 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 field lines in the magnetic circuit system 130 may be the same, and the directions of the plurality of second magnetic field lines may be the same.

[0092] As an example, the current direction of multiple voice coils 120 can be the same. For example, the current direction of the first voice coil 1201, the second voice coil 1202, the third voice coil, and / or the fourth voice coil is the same.

[0093] Inputting audio current into the first voice coil 1201, the second voice coil 1202, the third voice coil, and / or the fourth voice coil can make the direction of the Ampere force on the first part 121 and the second part 122 of the multiple voice coils the same, so as to realize the same direction of vibration of the multiple voice coils, ensure the consistency of the sound radiating device 100 in front and behind, improve the sound leakage prevention effect of the sound radiating device 100, and at the same time increase the amplitude of the first diaphragm 111 and the second diaphragm 112, thereby increasing the sound pressure level of the sound radiating device 100.

[0094] In an exemplary implementation, reference Figures 1 to 4 , Figure 12 , Figure 6 , Figure 13 and Figure 5 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, it may be made of a non-magnetic material, which may include, but is not limited to, aluminum.

[0095] In an exemplary implementation, reference Figure 13 as well as Figure 14In the third direction, there can be multiple magnetic circuit systems 130, and these 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 in 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 lines of force of the multiple magnetic circuit systems 130 can be the same, and the directions of the second magnetic lines of force can be the same, thereby ensuring that the direction of the Ampere force experienced by each voice coil 120 at different positions in the third direction is the same, realizing the same-direction 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 each voice coil 120 corresponding to multiple magnetic circuit systems 130 in the third direction, the first center magnet 131 can be spaced out, the second center magnet 132 can be spaced out, the first side magnet 133 can be spaced out, and the second side magnet 134 can be spaced out.

[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 instance, 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 be identical, and the first magnetic poles of the second side magnets 134 may be identical.

[0098] As an example, for each voice coil 120 corresponding to multiple magnetic circuit systems 130 in the third direction, the magnetic circuit support plate 137 can 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 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 a specific limitation on the number of magnetic circuit systems 130 corresponding to each voice coil 120 in the third direction.

[0101] In an exemplary implementation, reference Figure 15 and Figure 16The sound-generating device 100 may further include a first folded ring 140, a second folded ring 150, a third folded ring 160, and a first housing 170. One end of the first folded ring 140 in the second direction can be connected to the voice coil support plate 123, and the other end can be connected to the magnetic circuit support plate 137. The number of first folded rings 140 may be the same as the number of voice coils 120. The second folded ring 150 can be used to connect the first diaphragm 111 to the first housing 170. The third folded ring 160 can be used to connect the second diaphragm 112 to the first housing 170. By providing the first folded ring 140, the second folded ring 150, and the third folded ring 160, the sound-generating device 100 can have three folded rings in the vibration direction (e.g., the first direction), which helps to ensure that the first diaphragm 111 and the second diaphragm 112 can still vibrate along the first direction without polarization under a large amplitude, thereby minimizing the noise problem of the sound-generating device 100.

[0102] Furthermore, when the sound-generating device 100 has only one or two folds in the vibration direction (e.g., the first direction), the first diaphragm 111 and the second diaphragm 112 will become polarized when vibrating along the first direction at a large amplitude, resulting in noise problems. To avoid noise problems, the amplitudes of the first diaphragm 111 and the second diaphragm 112 can only be designed to be very small, which cannot provide a large sound pressure level. When the sound-generating device 100 has the aforementioned three folds in the vibration direction (e.g., the first direction), a larger amplitude can be provided by designing the voice coil 120 and / or the magnetic circuit system 130, thereby pushing more surrounding air to provide a larger sound pressure level.

[0103] It should be noted that the design of the vibration component 110, which includes two diaphragms, provides two support points for the vibration component 110 in the vibration direction (e.g., the first direction). In conjunction with the three folded rings mentioned above, it can further ensure that the vibration component 110 can still vibrate along the first direction without polarization under a large amplitude, thereby improving the noise problem of the sound generating device 100 as much as possible.

[0104] In an exemplary implementation, reference Figure 17 and Figure 17 The voice coil support plate 123 may be provided with an opening 1231, which can penetrate 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 folded ring 140 in the second direction can be embedded in the opening 1231, and the other end can be embedded in the groove. By embedding the two ends of the first folded ring 140 in the opening 1231 and the groove respectively in the second direction, the space size of the sound generating device 100 can be saved as much as possible, the volume of the sound generating device 100 can be reduced, and it is beneficial to realize the miniaturization of the sound generating device 100.

[0105] In an exemplary implementation, reference ​ , ​and ​ The sound-generating 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 a 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 define a first cavity 1811. The second cover plate 182 and the second diaphragm 112 define a second cavity 1821. The third cover plate 183 may be provided with a first sound outlet 1831, which communicates with the first cavity 1811. The fourth cover plate 184 may be provided with a second sound outlet 1841, which communicates with the second cavity 1821.

[0107] When a user wears the aforementioned sound-generating 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. An alternating audio current is input to the voice coil, and the sound-generating device 100 radiates sound rearward 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.

[0108] As an example, the area of ​​the first sound outlet 1831 and the area of ​​the second sound outlet 1841 can be substantially the same. 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 by the sound-generating device 100 in the forward and backward directions can be further ensured, so that the sound radiated in the forward direction and the sound radiated in the backward direction can better cancel each other out in the far field, thereby improving the sound leakage prevention effect of the sound-generating 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 to be substantially the same in the first direction, the consistency of the sound radiated by the sound-generating device 100 in the forward and backward directions can be further ensured, so that the sound radiated in the forward direction and the sound radiated in the backward direction can better cancel each other out in the far field, thereby improving the sound leakage prevention effect of the sound-generating device 100.

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

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

[0112] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, the above features may be formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A sound producing device, characterized by, The application relates to a loudspeaker comprising: a vibration assembly comprising a first diaphragm and a second diaphragm arranged in a first direction; a voice coil comprising a first part connected to the first diaphragm and a second part connected to the second diaphragm; and a magnetic circuit system comprising a first magnetic gap and a second magnetic gap, the first part being located in the first magnetic gap and the second part being located in the second magnetic gap, the magnetic circuit system being configured to drive the first part and the second part to vibrate in the same direction and drive the first diaphragm and the second diaphragm to vibrate in the same direction.

2. The sound production device of claim 1, wherein, The voice coil is in a plurality, and the plurality of voice coils are arranged in a second direction intersecting the first direction.

3. The sound production device of claim 2, wherein, The magnetic circuit system has a plurality of first magnetic gaps and a plurality of second magnetic gaps, and the first parts of the plurality of voice coils are respectively located in the plurality of first magnetic gaps, and the second parts of the plurality of voice coils are respectively located in the plurality of second magnetic gaps.

4. The sound production device of claim 3, wherein, The first parts of the plurality of voice coils are subjected to the same direction of ampere force in the first magnetic gap, and the second parts of the plurality of voice coils are subjected to the same direction of ampere force in the second magnetic gap.

5. The sound production device of claim 1, wherein, The first part of the voice coil is subjected to the same direction of ampere force in the first magnetic gap as the second part of the voice coil is subjected to in the second magnetic gap.

6. The sound production device of claim 3, wherein, The magnetic circuit system comprises: a first center magnet and a second center magnet, the first center magnet and the second center 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, the first side magnet and the second side magnet being respectively located on opposite sides of the first center magnet and the second center magnet along the second direction, the first side magnet, the second side magnet and the first center magnet forming a first magnetic gap therebetween, and the first side magnet, the second side magnet and the second center magnet forming a second magnetic gap therebetween.

7. The sound production device of claim 6, wherein, The first side magnet and the second side magnet each have a first end close to the first center magnet and a second end close to the second center magnet, the first end having a first magnetic pole and the second end having a second magnetic pole, the magnetic property of the first magnetic pole being opposite to that of the second magnetic pole; the magnetic property of the pole of the first center magnet close to the first side magnet is opposite to that of the first magnetic pole of the first side magnet, and the magnetic property of the pole of the second center magnet close to the first side magnet is opposite to that of the second magnetic pole of the first side magnet; and the magnetic property of the pole of the first center magnet close to the second side magnet is opposite to that of the first magnetic pole of the second side magnet, and the magnetic property of the pole of the second center magnet close to the second side magnet is opposite to that of the second magnetic pole of the second side magnet.

8. The sound production device of claim 7, wherein, The magnetic property of the first magnetic pole of the first side magnet is opposite to that of the second magnetic pole of the second side magnet.

9. The sound production device of claim 7, wherein, In the second direction, the number of the magnetic circuit systems is multiple, and the magnetic polarity of the first magnetic pole of the first edge magnet of two adjacent magnetic circuit systems is opposite, and the magnetic polarity of the first magnetic pole of the second edge magnet of two adjacent magnetic circuit systems is opposite.

10. An electronic device, comprising: A sound production device comprising a sound production device as claimed in any one of claims 1 to 9.

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