loudspeaker

Abstract

This application belongs to the field of electroacoustic transduction technology and discloses a loudspeaker. It includes a support shell, a vibration system, and a magnetic circuit system. At least a portion of the magnetic circuit system is disposed within and connected to the support shell. The vibration system is arranged around the outer periphery of the magnetic circuit system and includes a diaphragm and a voice coil connected to the diaphragm. The diaphragm includes a first diaphragm portion and a second diaphragm portion connected together. The second diaphragm portion has a folded ring structure, and the direction of the folded ring protrusion of the second diaphragm portion is perpendicular to the vibration direction of the first diaphragm portion. The first diaphragm portion is connected to the support shell, and the second diaphragm portion is connected to the support shell and / or the magnetic circuit system. The voice coil is energized and interacts with the magnetic circuit system to drive the diaphragm to vibrate. The loudspeaker provided by this application can have a large effective vibration area while maintaining a relatively small size, thereby meeting the requirements for high sound quality.

Description

Technical Field

[0001] This invention relates to the field of electroacoustic transduction technology, and more particularly to a loudspeaker. Background Technology

[0002] Speakers are important components in convenient electronic devices such as mobile phones, headphones, and computers, and directly affect the sound quality of the electronic devices.

[0003] In related technologies, to meet the miniaturization requirements of electronic devices, the size of the speaker needs to be designed to be small, that is, the thickness and size of the speaker need to be designed to be small. However, reducing the size of the speaker inevitably leads to a reduction in the size of the diaphragm inside the speaker, which in turn results in a smaller effective vibration area of ​​the speaker, making it impossible to meet the requirements for high sound quality. Summary of the Invention

[0004] One embodiment of this application provides a loudspeaker to solve the technical problem of the inability to simultaneously meet the requirements of miniaturization and high sound quality.

[0005] The technical solution adopted in one embodiment of this application is: Speakers, including: Support shell; A magnetic circuit system, at least a portion of which is disposed within and connected to the support housing; A vibration system is disposed around the outer periphery of the magnetic circuit system. The vibration system includes a diaphragm and a voice coil connected to the diaphragm. The diaphragm includes a first diaphragm portion and a second diaphragm portion connected to each other. The second diaphragm portion has a folded ring structure. The folded ring protrusion of the second diaphragm portion is perpendicular to the vibration direction of the first diaphragm portion. The first diaphragm portion is connected to the support shell, and the second diaphragm portion is connected to the support shell and / or the magnetic circuit system. The voice coil is energized and interacts with the magnetic circuit system to drive the diaphragm to vibrate.

[0006] In one or more embodiments of this application, the first diaphragm portion is annular, and the second diaphragm portion is connected to the inner or outer periphery of the first diaphragm portion; And / or, at least a portion of the orthographic projection of the second diaphragm portion along the vibration direction of the first diaphragm portion overlaps with the orthographic projection of the first diaphragm portion along the vibration direction of the first diaphragm portion.

[0007] In one or more embodiments of this application, the diaphragm further includes a third diaphragm portion, which is disposed on the side of the first diaphragm portion away from the second diaphragm portion, and the third diaphragm portion is connected to the first diaphragm portion. The first diaphragm portion is connected to the support shell and / or the magnetic circuit system through the third diaphragm portion. The third diaphragm portion has a folded ring structure, and the folded ring protrusion of the third diaphragm portion is in the same direction as the vibration direction of the first diaphragm portion.

[0008] In one or more embodiments of this application, in a direction perpendicular to the vibration direction of the first diaphragm portion, the third diaphragm portion is disposed on the side of the second diaphragm portion away from the magnetic circuit system, the outer periphery of the third diaphragm portion is connected to the support shell, and the second diaphragm portion is connected to the magnetic circuit system and / or the support shell; Alternatively, in a direction perpendicular to the vibration direction of the first diaphragm portion, the third diaphragm portion is disposed on the side of the second diaphragm portion near the magnetic circuit system, the inner periphery of the third diaphragm portion is connected to the magnetic circuit system, and the second diaphragm portion is connected to the support shell.

[0009] In one or more embodiments of this application, the second diaphragm portion is disposed on one side of the first diaphragm portion in the first direction; The diaphragm further includes a vibrating plate, which is disposed on the side of the first diaphragm portion away from the second diaphragm portion in a first direction and is attached to the first diaphragm portion. The voice coil and the diaphragm are arranged in a direction perpendicular to the first direction, and the voice coil is connected to the diaphragm; wherein, the first direction is the vibration direction of the first diaphragm portion.

[0010] In one or more embodiments of this application, the support shell includes a support plate and an annular support member connected to one side of the support plate. The annular support member and the support plate cooperate to form an installation space. The second diaphragm portion is located in the installation space and connected to the magnetic circuit system and / or the support plate. At least a portion of the magnetic circuit system is located in the installation space and connected to the support plate.

[0011] In one or more embodiments of this application, the support shell includes a first shell and a second shell arranged and connected to each other along the vibration direction of the first diaphragm portion, the first shell and the second shell cooperating to form a receiving cavity, and the magnetic circuit system and the vibration system are both disposed in the receiving cavity; One end of the magnetic circuit system in the vibration direction of the first diaphragm is connected to the first housing, and the other end of the magnetic circuit system in the vibration direction of the first diaphragm is connected to the second housing; the second diaphragm is connected to at least one of the first housing, the second housing, and the magnetic circuit system.

[0012] In one or more embodiments of this application, the magnetic circuit system includes a magnetic pole plate and magnetic assemblies. The magnetic pole plate is connected to the magnetic assemblies on both sides of the first diaphragm portion in the vibration direction. At least one of the two magnetic assemblies is connected to the support shell, and the second diaphragm portion is connected to one of the magnetic assemblies and / or the support shell. The two magnetic groups are symmetrically arranged with the magnetic pole plate as the center of symmetry; and / or, the magnetic poles of the two magnetic groups are symmetrically arranged with the magnetic pole plate as the center of symmetry.

[0013] In one or more embodiments of this application, the shell wall of the support shell is provided with a mounting hole that penetrates the shell wall, at least a portion of the magnetic circuit system is provided in the mounting hole, and the magnetic circuit system abuts against the wall of the mounting hole.

[0014] In one or more embodiments of this application, the surface of the diaphragm is provided with a conductive structure, and the conductive structure is electrically connected to the voice coil.

[0015] In one or more embodiments of this application, the inner wall of the support shell is provided with a groove, and the second diaphragm portion is provided with a first extension portion at the edge away from the first diaphragm portion in the vibration direction of the first diaphragm portion. The first extension portion is disposed in the groove and connected to the support shell.

[0016] The beneficial effects of one embodiment of this application are as follows: In one embodiment of this application, the diaphragm of the vibration system includes a first diaphragm portion and a second diaphragm portion. The folded ring protrusion of the second diaphragm portion is perpendicular to the vibration direction of the first diaphragm portion. On the one hand, this allows the diaphragm to have a larger effective vibration area. On the other hand, it also allows the first diaphragm portion and the second diaphragm portion to extend in different dimensions in space. This allows both the areas of the first diaphragm portion and the second diaphragm portion to be designed to be larger, while the space required in space can be smaller. This satisfies the design requirements for miniaturization of the loudspeaker, and enables the loudspeaker to meet both miniaturization and high sound quality requirements. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this application and these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a loudspeaker provided in one embodiment of this application; Figure 2 This is an exploded view of a loudspeaker provided in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of a loudspeaker diaphragm provided in one embodiment of this application; Figure 4 This is a top view of a loudspeaker provided in one embodiment of this application; Figure 5 This application Figure 4 A cross-sectional view of the structure shown; Figure 6 This application Figure 4 BB cross-sectional view of the structure shown; Figure 7 This application Figure 6 The enlarged view at point C is shown below; Figure 8 This is a distribution diagram of the magnetic flux density of a loudspeaker provided in one embodiment of this application; Figure 9 This is a schematic diagram of the first structure of another loudspeaker provided in an embodiment of this application; Figure 10 This is a schematic diagram of the second structure of another loudspeaker provided in one embodiment of this application; Figure 11 This is a first cross-sectional view of another loudspeaker provided in an embodiment of this application; Figure 12 This is a second cross-sectional view of another loudspeaker provided in an embodiment of this application.

[0019] Explanation of reference numerals in the attached figures: 1. Support shell; 13. Support plate; 14. Annular support; 15. Installation space; 16. First shell; 17. Second shell; 18. Accommodating cavity; 19. Mounting hole; 1a. Groove; 1b. Weight reduction hole; 2. Magnetic circuit system; 21. Magnetic pole plate; 22. Magnetic assembly; 221. First magnet; 222. Second magnet; 3. Vibration system; 31. Diaphragm; 311. Third diaphragm section; 312. Second diaphragm section; 313. First diaphragm section; 314. Vibrating plate; 315. First extension section; 316. Second extension section; 32. Voice coil; 4. Conductive structure; X, First direction. Detailed Implementation

[0020] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not all of them.

[0021] It should be understood that the phrase "an embodiment" or "one embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in one embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0025] In the description of this embodiment, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0026] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

[0027] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] This embodiment provides a loudspeaker that can have a large effective vibrating area while having a small size, thereby meeting the requirements for high sound quality.

[0029] For example, such as Figures 1 to 4 As shown, the loudspeaker includes a support shell 1, a magnetic circuit system 2, and a vibration system 3. The support shell 1 is used to mount, fix, and support components such as the magnetic circuit system 2 and the vibration system 3; that is, the support shell 1 provides a mounting base for components such as the magnetic circuit system 2 and the vibration system 3. It is understood that the support shell 1 can be a single integral structure or formed by the cooperation of multiple separate structures; no limitation is made here.

[0030] The loudspeaker is used in electronic devices, meaning it can be mounted on the device via a support housing 1. It should be noted that the loudspeaker's support housing 1 can be a separate shell or enclosure structure from the electronic device. In this case, the support housing 1 integrates the loudspeaker's magnetic circuit system 2 and vibration system 3 into a single structure, facilitating assembly and disassembly. Alternatively, the loudspeaker's support housing 1 can be integrally molded with the electronic device's shell or enclosure structure, effectively improving structural strength and sealing performance while reducing the size of the electronic device.

[0031] It should be noted that the shape of the support shell 1 can be cuboid, cube, cylinder, cone, prism, etc., and the specific shape can be selected according to the requirements.

[0032] In some alternative embodiments, such as Figure 1 As shown, the support shell 1 in this embodiment is rectangular parallelepiped in shape, that is, the speaker as a whole is rectangular parallelepiped in shape. The support shell 1 has a length direction, a width direction, and a thickness direction.

[0033] In some embodiments, such as Figure 1 and Figure 2 As shown, at least a portion of the magnetic circuit system 2 is disposed within the support shell 1 and connected to the support shell 1 to achieve fixation of the magnetic circuit system 2.

[0034] In this embodiment, the vibration system 3 is arranged around the outer periphery of the magnetic circuit system 2. That is, the vibration system 3 is arranged outside the magnetic circuit system, so that it can cooperate with the magnetic circuit system 2 to vibrate and produce sound.

[0035] For example, such as Figure 2 and Figure 3 As shown, the vibration system 3 includes a diaphragm 31 and a voice coil 32 connected to the diaphragm 31. In some embodiments, both the diaphragm 31 and the voice coil 32 may be annular, and the diaphragm 31 and the voice coil 32 may respectively surround the periphery of the magnetic circuit system 2. In other embodiments, the diaphragm 31 and the voice coil 32 may not be annular structures, but may be other shapes; this embodiment does not limit this.

[0036] In this embodiment, please continue to refer to Figure 2 and Figure 3 The diaphragm 31 includes a first diaphragm portion 313 and a second diaphragm portion 312 connected to each other. The second diaphragm portion 312 has a folded ring structure, and the direction of the folded ring protrusion of the second diaphragm portion 312 is perpendicular to the vibration direction of the first diaphragm portion 313. The first diaphragm portion 313 is connected to the support shell 1, and the second diaphragm portion 312 is connected to the support shell 1 and / or the magnetic circuit system 2. In this embodiment, by providing the first diaphragm portion 313 and the second diaphragm portion 312, the effective vibration area of ​​the diaphragm 31 can be increased. By setting the direction of the folded ring protrusion of the second diaphragm portion 312 perpendicular to the vibration direction of the first diaphragm portion 313, the diaphragm 31 can extend in two dimensions of space, resulting in a smaller volume required in both dimensions, which is beneficial for the miniaturization of the loudspeaker.

[0037] In this embodiment, the vibration direction of the first diaphragm portion 313 is referred to as the first direction X. In some embodiments, the first direction is the thickness direction of the entire loudspeaker, and the thickness of the loudspeaker is less than the length and width directions of the loudspeaker. In other embodiments, the first direction may also be the width direction, length direction, etc. of the loudspeaker, and this embodiment does not limit this.

[0038] In some embodiments of this application, the second diaphragm portion 312 is connected to the support shell 1 to achieve a fixed connection between the diaphragm 31 and the support shell 1.

[0039] In some other embodiments of this application, the second diaphragm portion 312 is connected to the magnetic circuit system 2, so as to be indirectly connected to the support shell 1 through the magnetic circuit system 2.

[0040] In this embodiment, the voice coil 32 is energized and interacts with the magnetic circuit system 2 to drive the diaphragm 31 to vibrate. Specifically, the first diaphragm portion 313 and the second diaphragm portion 312 can vibrate respectively, so that the first diaphragm portion 313 and the second diaphragm portion 312 drive the air to move and produce sound.

[0041] It should be noted that the overall vibration direction of the diaphragm 31 is the first direction X, that is, the vibration direction of both the first diaphragm portion 313 and the second diaphragm portion 312 is the first direction X. When the first diaphragm portion 313 vibrates along the first direction X, it can push the air on both sides to move along the first direction X. When the second diaphragm portion 312 vibrates along the first direction X, since the folded ring protrusion of the second diaphragm portion 312 is perpendicular to the first direction X, the second diaphragm portion 312 compresses the air inside and around it to move in a direction perpendicular to the first direction X, thus also performing work on the gas to cause the gas to expand or compress.

[0042] The loudspeaker provided in this embodiment has a diaphragm 31 in the vibration system 3, which includes a first diaphragm portion 313 and a second diaphragm portion 312. The folded ring protrusion of the second diaphragm portion 312 is perpendicular to the vibration direction of the first diaphragm portion 313. On the one hand, this allows the diaphragm 31 to have a larger effective vibration area. On the other hand, it also allows the first diaphragm portion 313 and the second diaphragm portion 312 to extend in different dimensions in space. This allows the areas of both the first diaphragm portion 313 and the second diaphragm portion 312 to be designed to be large, while requiring less space in space. This satisfies the design requirements for miniaturization of the loudspeaker, and enables the loudspeaker to balance miniaturization and high sound quality requirements.

[0043] In one embodiment of this application, such as Figure 2 and Figure 3 As shown, the first diaphragm portion 313 is annular, and the second diaphragm portion 312 is connected to the inner periphery of the first diaphragm portion 313. That is, the second diaphragm portion 312 is disposed close to the inner side of the first diaphragm portion 313 and is connected to the inner edge of the first diaphragm portion 313 in the circumferential width direction.

[0044] In another embodiment of this application, the first diaphragm portion 313 is annular, and the second diaphragm portion 312 is connected to the outer periphery of the first diaphragm portion 313. That is, the second diaphragm portion 312 is disposed close to the outer side of the first diaphragm portion 313 and connected to the outer edge of the first diaphragm portion 313 in the circumferential width direction.

[0045] By connecting the second diaphragm portion 312 to the inner or outer periphery of the first diaphragm portion 313, the second diaphragm portion 312 makes full use of the edge space of the first diaphragm portion 313 without affecting the vibration area of ​​the first diaphragm portion 313. This ensures that the first diaphragm portion 313 has a large effective vibration area. Furthermore, the second diaphragm portion 312 has a smaller impact on the vibration amplitude of the first diaphragm portion 313, which is beneficial to improving the sound quality of the speaker.

[0046] In some optional embodiments, at least a portion of the orthographic projection of the second diaphragm portion 312 along the vibration direction (i.e., the first direction X) of the first diaphragm portion 313 overlaps with the orthographic projection of the first diaphragm portion 313 along the first direction X. That is, at least a portion of the second diaphragm portion 312 is directly opposite the first diaphragm portion 313 in the first direction X. This arrangement can fully utilize the space on both sides of the first diaphragm portion 313 in the first direction X, allowing the diaphragm 31 to have a smaller size in the direction perpendicular to the first direction X while maintaining a larger effective diaphragm area, further improving the miniaturization of the diaphragm 31 and the speaker.

[0047] In some embodiments, such as Figures 5 to 7 As shown, the first diaphragm portion 313 is a planar structure perpendicular to the first direction X, that is, the thickness direction of the first diaphragm portion 313 is the first direction X. In some other embodiments, the first diaphragm portion 313 may also be a folded ring structure, which is not limited in this embodiment.

[0048] In one or more embodiments of this application, such as Figure 2 and Figure 3 As shown, the diaphragm 31 also includes a third diaphragm portion 311. The third diaphragm portion 311 is disposed on the side of the first diaphragm portion 313 opposite to the second diaphragm portion 312 in the first direction X, and the third diaphragm portion 311 is connected to the first diaphragm portion 313.

[0049] In some embodiments, both the second diaphragm portion 312 and the third diaphragm portion 311 are annular. When the second diaphragm portion 312 is connected to the inner periphery of the first diaphragm portion 313, the third diaphragm portion 311 is connected to the outer periphery of the first diaphragm portion 313; when the second diaphragm portion 312 is connected to the outer periphery of the first diaphragm portion 313, the third diaphragm portion 311 is connected to the inner periphery of the first diaphragm portion 313. By providing the third diaphragm portion 311, the effective vibration area of ​​the diaphragm 31 is further increased.

[0050] In at least one embodiment, the first diaphragm portion 313 is connected to the support shell 1 and / or the magnetic circuit system 2 via the third diaphragm portion 311, that is, the first diaphragm portion 313 is indirectly connected to the support shell 1 and / or the magnetic circuit system 2.

[0051] For example, such as Figure 7 As shown, the third diaphragm portion 311 has a folded ring structure, and the direction of the folded ring protrusion of the third diaphragm portion 311 is the same as the vibration direction of the first diaphragm portion 313. By designing the third diaphragm portion 311 as a folded ring structure, the third diaphragm portion 311 has a larger vibration area. The third diaphragm portion 311 and the second diaphragm portion 312 are located on both sides of the ring width of the first diaphragm portion 313, so that the second diaphragm portion 312 and the third diaphragm portion 311 will not interfere with each other, ensuring the smooth vibration of the diaphragm 31.

[0052] In some embodiments of this application, the third diaphragm portion 311 and the second diaphragm portion 312 are both connected to the support shell 1 to realize the connection between the diaphragm 31 and the support shell 1.

[0053] In some other embodiments of this application, one of the third diaphragm portion 311 and the second diaphragm portion 312 is connected to the support shell 1, and the other is connected to the magnetic circuit system 2. This arrangement allows the diaphragm 31 to be fixed via the magnetic circuit system 2.

[0054] In this embodiment, by providing the first diaphragm portion 313, the transition between the third diaphragm portion 311 and the second diaphragm portion 312 can be realized, reducing the difficulty of connecting the third diaphragm portion 311 and the second diaphragm portion 312, and also reducing the risk of interference between the third diaphragm portion 311 and the second diaphragm portion 312.

[0055] In this embodiment, the voice coil 32 is connected to the first diaphragm portion 313. Since the first diaphragm portion 313 is relatively flat, it is convenient to fix and assemble the voice coil 32.

[0056] For example, such as Figures 4 to 7 As shown, the thickness direction of the first diaphragm portion 313 is the first direction X. The third diaphragm portion 311 is disposed on one side of the first diaphragm portion 313 in the direction perpendicular to the first direction X, and the second diaphragm portion 312 is disposed on one side of the first diaphragm portion 313 in the first direction X. With this arrangement, the annular width of the diaphragm 31 is the sum of the annular width of the first diaphragm portion 313 and the annular width of the third diaphragm portion 311, which allows the annular width of the diaphragm 31 to be smaller, thereby allowing the size of the speaker in the direction perpendicular to the first direction X to be smaller, further facilitating the miniaturization of the speaker.

[0057] In some optional embodiments, the third diaphragm portion 311, the second diaphragm portion 312, and the first diaphragm portion 313 are an integral structure to improve structural strength and reduce the risk of breakage.

[0058] In one or more embodiments of this application, the second diaphragm portion 312 is disposed on one side of the first diaphragm portion 313 in the first direction X, so as to make full use of the space on one side of the second diaphragm portion 312.

[0059] In some embodiments, such as Figure 7 As shown, the diaphragm 31 also includes a vibrating plate 314. The vibrating plate 314 is disposed on the side of the first diaphragm portion 313 facing away from the second diaphragm portion 312 in the first direction X, and is attached to the first diaphragm portion 313. The vibrating plate 314 is made of a rigid material, giving it high rigidity, which in turn improves the overall rigidity of the diaphragm 31 and reduces the risk of cracking.

[0060] In this embodiment, the voice coil 32 and the diaphragm 314 are arranged in a direction perpendicular to the first direction X, and the voice coil 32 is connected to the diaphragm 314. That is, the voice coil 32 and the diaphragm 314 are located on the same side of the first diaphragm portion 313 in the first direction X. By designing the voice coil 32 to be arranged in a direction perpendicular to the first direction X with the diaphragm 314, the space on one side of the diaphragm 314 can be fully utilized. Compared to the method where the voice coil 32 is located on the side of the diaphragm 314 away from the first diaphragm portion 313, the space occupied in the first direction X can be reduced, which is beneficial to the reduction of the speaker thickness. Connecting the voice coil 32 to the diaphragm 314, so that the voice coil 32 is connected to both the first diaphragm portion 313 and the diaphragm 314, increases the connection area between the voice coil 32 and the diaphragm 31, improves the connection strength, and the diaphragm 314 can also limit the position of the voice coil 32, reducing the risk of the voice coil 32 moving relative to the diaphragm 31.

[0061] In at least one implementation, such as Figure 5 As shown, at least one end of the magnetic circuit system 2 in the first direction X is connected to the support shell 1 to fix the magnetic circuit system 2 and prevent the magnetic circuit system 2 from moving relative to the support shell 1. The end of the magnetic circuit system 2 in the first direction X is connected to the support shell 1 so that the connection between the magnetic circuit system 2 and the support shell 1 will not interfere with the vibration system 3.

[0062] In some optional embodiments, both the diaphragm 31 and the voice coil 32 are arranged around the magnetic circuit system 2 with an axis extending along the first direction X as the surrounding axis. That is, the diaphragm 31 is arranged around the outside of the magnetic circuit system 2, and the voice coil 32 is arranged around the outside of the magnetic circuit system 2.

[0063] In some optional embodiments, the voice coil 32 is a planar voice coil. A planar voice coil refers to a voice coil 32 whose wiring is wound, printed, or laid flat on a plane (in this embodiment, the surface in the thickness direction of the diaphragm 31), or a voice coil 32 with very small thickness or height is attached to the diaphragm 31, and the planar voice coil is positioned facing the magnetic circuit system 2. That is, the direction of the smallest dimension of the planar voice coil is the same as the thickness direction of the diaphragm 31. Furthermore, in this embodiment, the planar voice coil and the magnetic circuit system 2 are spaced apart. It should also be noted that the planar voice coil has lower distortion, and the planar voice coil can move synchronously with the diaphragm 31 as a whole, fundamentally eliminating the segmented vibration between the voice coil 32 and the diaphragm 31. In addition, the magnetic field can be uniformly distributed on the surface of the diaphragm 31, so that the driving force acts evenly on the entire diaphragm 31, improving the symmetry of the driving force, thereby ensuring sound quality. Since planar voice coils are generally lighter and have lower inertia, they can start and stop instantaneously, exhibiting excellent transient response. Furthermore, since all points on the diaphragm 31 of the planar voice coil move simultaneously and in the same direction, its acoustic characteristics are closer to those of a point sound source, resulting in a more accurate and clearer sound field. Additionally, the planar voice coil's wires are laid flat on a plane, providing a large contact area with the air, which gives it higher heat dissipation efficiency and allows it to handle greater power.

[0064] In at least one embodiment, the diaphragm 31 surrounding the outer side of the magnetic circuit system 2 can also be understood as the diaphragm 31 being disposed on the periphery of the magnetic circuit system 2. That is, the diaphragm 31 is not connected to the end face of the magnetic circuit system 2 in the first direction X, but rather to the middle part of the magnetic circuit system 2 in the first direction X. With this arrangement, the diaphragm 31 can make full use of the space around the magnetic circuit system 2. The diaphragm 31 and the magnetic circuit system 2 are not arranged along the first direction X, but rather in a direction perpendicular to the first direction X, so that the thickness of the magnetic circuit system 2 will not affect the vibration amplitude of the diaphragm 31.

[0065] In the speaker provided in this embodiment, the diaphragm 31 and voice coil 32 of the vibration system 3 are both disposed around the outside of the magnetic circuit system 2, so that the diaphragm 31 and voice coil 32 are disposed on one side of the magnetic circuit system 2 in a direction perpendicular to the first direction X. This means that the two sides of the diaphragm 31 and voice coil 32 in the first direction X are not opposite to the magnetic circuit system 2, thereby increasing the maximum vibration space of the vibration system 3. The maximum air-driven volume of the vibration system 3 is increased, which can effectively improve low-frequency sensitivity, enhance sound quality, improve acoustic performance, and enhance product performance. Furthermore, the voice coil 32 is a planar voice coil, which reduces the volume that the voice coil 32 needs to occupy in the first direction X. The overall thickness of the speaker depends on the size of the magnetic circuit system 2 in the first direction X, thus enabling an ultra-thin speaker design.

[0066] In some alternative embodiments, such as Figures 3 to 7As shown, in a direction perpendicular to the first direction X, the third diaphragm portion 311 is disposed on the side of the second diaphragm portion 312 facing away from the magnetic circuit system 2. The outer periphery of the third diaphragm portion 311 is connected to the support shell 1, and the second diaphragm portion 312 is connected to the magnetic circuit system 2 or the support shell 1. At this time, the convex direction of the second diaphragm portion 312 is facing away from the magnetic circuit system 2, so that the magnetic circuit system 2 will not interfere with the vibration and deformation of the second diaphragm portion 312. The third diaphragm portion 311 is far away from the magnetic circuit system 2, so that the magnetic circuit system 2 will not interfere with the vibration and deformation of the third diaphragm portion 311, thereby improving the reliability of the structure.

[0067] In some other alternative embodiments, in a direction perpendicular to the first direction X, the third diaphragm portion 311 is disposed on the side of the second diaphragm portion 312 closer to the magnetic circuit system 2; that is, the second diaphragm portion 312 is farther away from the magnetic circuit system 2 than the third diaphragm portion 311. Furthermore, the inner periphery of the third diaphragm portion 311 is connected to the magnetic circuit system 2, and the second diaphragm portion 312 is connected to the support shell 1.

[0068] In one or more embodiments of this application, such as Figures 2 to 5 As shown, the magnetic circuit system 2 includes a magnetic pole plate 21 and magnetic groups 22. Magnetic groups 22 are connected to both sides of the magnetic pole plate 21 in the first direction X. At least one of the two magnetic groups 22 on both sides of the magnetic pole plate 21 is connected to the support shell 1, thereby connecting the two magnetic groups 22 and the magnetic pole plate 21 to the support shell 1. In this embodiment, the second diaphragm portion 312 is connected to one of the magnetic groups 22 or the support shell 1.

[0069] In some optional embodiments, the two magnetic groups 22 on both sides of the magnetic pole plate 21 are symmetrically arranged with the magnetic pole plate 21 as the center of symmetry. With this arrangement, the entire magnetic circuit system 2 has a symmetrical structure, which makes the weight distribution of the magnetic circuit system 2 more uniform, reduces problems such as polarization and resonance caused by uneven weight distribution of the magnetic circuit system 2, improves the uniformity and reliability of the vibration of the driving diaphragm 31, and ensures the sound quality and sound effect of the speaker.

[0070] In one embodiment of this application, the magnetic poles of the two magnetic groups 22 are symmetrically arranged with the magnetic pole plate 21 as the center of symmetry. This arrangement can form opposing magnetic fields, thereby achieving a larger magnetic field strength at the voice coil 32. That is, the magnetic field is enhanced at the voice coil 32, thereby improving the driving efficiency and driving effect of the voice coil 32 and the diaphragm 31.

[0071] In this embodiment, the voice coil 32 is positioned close to the magnetic circuit system 2 to enable rapid sensing and improve the sensitivity of the speaker.

[0072] A simulation of the magnetic flux density in the horizontal direction (i.e., the direction perpendicular to the first direction X) of the loudspeaker provided in this application was performed, and the results are as follows: Figure 8The diagram shows the horizontal magnetic field strength distribution. In both magnetic groups 22, the poles closest to the magnetic pole plate 21 are N poles, and the poles furthest from the magnetic pole plate 21 are S poles. Figure 8 As can be seen, the magnetic field lines are relatively evenly distributed, and the magnetic induction intensity is relatively strong at voice coil 32.

[0073] In one or more embodiments of this application, such as Figure 1 and Figure 2 As shown, a conductive structure 4 is provided on the surface of the diaphragm 31. The conductive structure 4 is electrically connected to the voice coil 32 to realize the electrical connection between the voice coil 32 and the external circuit. By providing the conductive structure 4 on the diaphragm 31, the risk of interference caused by asynchronous movement of the diaphragm 31 and the conductive structure 4 is reduced, thereby enabling the external circuit and the voice coil 32 to be stably and reliably connected through the conductive structure 4, thus improving the electrical connection reliability of the loudspeaker. In some embodiments, the conductive structure 4 is provided on the first diaphragm portion 313 and the third diaphragm portion 311.

[0074] Optionally, such as Figure 1 As shown, the end of the conductive structure 4 facing away from the voice coil 32 can be exposed through the support shell 1 to facilitate electrical connection with an external circuit. Exemplarily, the support shell 1 may have a through hole (not shown in the figure), through which the conductive structure 4 protrudes and is exposed on the support shell 1.

[0075] In at least one embodiment, the conductive structure 4 and the voice coil 32 are located on the same side of the diaphragm 31 in the first direction X, so that the electrical connection between the two does not need to pass through the diaphragm 31, reducing the difficulty of connection.

[0076] In some embodiments, the conductive structure 4 can be a conductive coating formed on the surface of the diaphragm 31 in the first direction X. The conductive coating and the diaphragm 31 have a large connection area, reducing the risk of the conductive coating falling off and thus improving the stability of the electrical connection. In other embodiments, the conductive structure 4 can also be a conductive sheet, a wire, or other structure, which is not limited in this embodiment.

[0077] Optionally, the conductive coating material can be conductive materials such as nano-silver or nano-copper, but this embodiment does not limit this.

[0078] In one or more embodiments of this application, such as Figure 2 and Figure 7As shown, the inner wall of the support shell 1 is provided with a groove 1a, and the second diaphragm portion 312 has a first extension portion 315 on the edge away from the first diaphragm portion 313 in the first direction X. The first extension portion 315 is disposed in the groove 1a and connected to the support shell 1. By providing the groove 1a, the first extension portion 315 can be accommodated, thereby reducing the space occupied by the first extension portion 315 in the first direction X, so that the size of the entire speaker in the first direction X can be smaller, which is beneficial to the thinning of the speaker.

[0079] In some optional embodiments, the first extension 315 has a straight structure and is annular. Correspondingly, the groove 1a is annular, which increases the connection strength between the first extension 315 and the support shell 1, thereby improving the fixing strength of the edge of the second diaphragm portion 312 in the first direction X.

[0080] The specific structure of the speaker support shell 1 can be varied. This embodiment provides the following two support shells 1 as examples.

[0081] In one embodiment of the support shell 1 of this application, as Figures 1 to 7 As shown, the support shell 1 includes a support plate 13 and an annular support member 14 connected to one side of the support plate 13 in the thickness direction. That is, the support shell 1 provided in this embodiment has an opening at one end. The magnetic circuit system 2 is connected to the support plate 13 at one end in the first direction X. The support shell 1 provided in this embodiment has an opening at one end in the first direction X, which makes the magnetic field at the position of the voice coil 32 stronger. Furthermore, without the obstruction of the support shell 1, the amplitude space of the diaphragm 31 can be larger, which can meet the requirements of higher amplitude loudspeakers.

[0082] In some alternative embodiments, such as Figures 5 to 7 As shown, the annular support 14 and the support plate 13 cooperate to form an installation space 15. The second diaphragm portion 312 is located within the installation space 15 and is connected to the magnetic circuit system 2 and / or the support plate 13. At least a portion of the magnetic circuit system 2 is located within the installation space 15 and is connected to the support plate 13. By placing the second diaphragm portion 312 within the installation space 15, the installation space 15 formed by the annular support 14 and the support plate 13 can be fully utilized, and the second diaphragm portion 312 can be better protected, preventing other components from interfering with it.

[0083] In this embodiment, the outer periphery of the third diaphragm portion 311 is connected to the annular support member 14. Exemplarily, the outer periphery of the third diaphragm portion 311 may be connected to a second extension portion 316, which may be connected to the end face of the annular support member 14 away from the support plate 13 to improve the connection strength.

[0084] Alternatively, when the support shell 1 includes a support plate 13 and an annular support member 14, the magnetic assembly 22 of the magnetic circuit system 2 facing away from the support plate 13 can protrude from the annular support member 14 in the first direction X. That is, the size of the annular support member 14 in the first direction X does not need to be designed to be too large, which is conducive to the lightweight and miniaturization of the support shell 1.

[0085] In at least one embodiment, the support plate 13 can be a magnetic plate to enhance the magnetic field strength at the position of the voice coil 32, thereby improving the power conversion efficiency and control of the loudspeaker, making the voice coil 32 and diaphragm 31 have a rapid dynamic response and be able to expand and contract freely. Furthermore, it can output stably under high load, is not prone to degradation, and has higher sensitivity.

[0086] In one embodiment of the support shell 1 of this application, as Figures 9 to 12 As shown, the support shell 1 includes a first shell 16 and a second shell 17 arranged and connected to each other along the first direction X. The first shell 16 and the second shell 17 cooperate to form a receiving cavity 18, within which the magnetic circuit system 2 and the vibration system 3 are both housed. By providing the first shell 16 and the second shell 17, and forming the receiving cavity 18 with the first shell 16 and the second shell 17, the vibration system 3 and the magnetic circuit system 2 can be better protected. Furthermore, the speaker is a single, integrated unit, facilitating assembly and disassembly.

[0087] In one embodiment, one end of the magnetic circuit system 2 in the first direction X is connected to the first housing 16, and the other end of the magnetic circuit system 2 in the first direction X is connected to the second housing 17. This arrangement further improves the connection strength between the magnetic circuit system 2 and the supporting housing 1, reduces the risk of the magnetic circuit system 2 moving relative to the supporting housing 1, and also avoids the risk of the magnetic circuit system 2 wobbling at one end in the first direction X.

[0088] In some embodiments, such as Figures 4 to 6 As shown, the outer periphery of the third diaphragm portion 311 of the diaphragm 31 is connected between the first shell 16 and the second shell 17. In some optional embodiments, the outer periphery of the third diaphragm portion 311 is connected to a second extension portion 316, which can be clamped and fixed between the first shell 16 and the second shell 17 to have a higher connection strength.

[0089] It is understandable that the outer periphery of the diaphragm 31 may be connected only to the first shell 16 or only to the second shell 17, but this embodiment does not limit this.

[0090] In this embodiment, the second diaphragm portion 312 is connected to at least one of the first housing 16, the second housing 17, and the magnetic circuit system 2.

[0091] In at least one embodiment of this application, both the first shell 16 and the second shell 17 are magnetically conductive shells; that is, the material of the first shell 16 is a magnetically conductive material, and the material of the second shell 17 is also a magnetically conductive material. This arrangement further enhances the magnetic field strength at the location of the voice coil 32, thereby improving the speaker's electro-electric conversion efficiency and controllability. This results in rapid and flexible dynamic response from the voice coil 32 and diaphragm 31, stable output under high loads, reduced degradation, and higher sensitivity.

[0092] Alternatively, the second shell 17 can be a split structure. For example, the second shell 17 includes a yoke (not shown in the figure) and a support frame (not shown in the figure) disposed on the yoke. The support frame is annular and connected to the edge of the yoke. In this embodiment, the yoke is made of a magnetically conductive material. The bottom end of the magnetic circuit system 2 in the first direction X is connected to the yoke.

[0093] In one or more embodiments of this application, such as Figure 9 and Figure 10 The support shell 1 has a through-hole 19 in its shell wall. At least a portion of the magnetic circuit system 2 is disposed in the mounting hole 19, and the magnetic circuit system 2 abuts against the wall of the mounting hole 19. By providing the mounting hole 19, the volume of the magnetic circuit system 2 can be further increased without increasing the height of the support shell 1, thereby greatly increasing the horizontal magnetic induction intensity in the amplitude region of the voice coil 32, and thus further improving the acoustic performance of the loudspeaker.

[0094] It should be noted that the end face of the magnetic circuit system 2 is not more than the outer surface of the support shell 1, so as to avoid the speaker thickness increasing too much due to the excessive size of the magnetic circuit system 2 in the first direction X.

[0095] In some embodiments, such as Figure 9 and Figure 10 As shown, when the support shell 1 includes a first shell 16 and a second shell 17, both the first shell 16 and the second shell 17 may be provided with mounting holes 19. One end of the magnetic circuit system 2 in the first direction X is located in the mounting hole 19 of the first shell 16, and the other end of the magnetic circuit system 2 in the first direction X is located in the mounting hole 19 of the second shell 17, thereby further increasing the volume of the magnetic circuit system 2.

[0096] In some embodiments, when the support shell 1 includes a support plate 13 and an annular support member 14, the support plate 13 is provided with a mounting hole 19, and one end of the magnetic circuit system 2 in the first direction X is located in the mounting hole 19.

[0097] In one or more embodiments of this application, such as Figures 1 to 7As shown, each magnetic assembly 22 may include one magnet, and the opposing surfaces of the two magnets have the same magnetism. It should be noted that this speaker configuration is suitable for applications with a height of 2.5mm or less, and can meet sound quality requirements.

[0098] In one or more embodiments of this application, such as Figures 9 to 12 As shown, each magnetic assembly 22 may also include multiple magnets, which are arranged and connected sequentially along the first direction X. By using multiple magnets, it is suitable for applications where the speaker height is greater than 2.5mm, thus meeting sound quality requirements. Furthermore, using multiple magnets can significantly increase the horizontal magnetic induction intensity within the amplitude region of the voice coil 32, thereby further improving the acoustic performance of the speaker.

[0099] In this embodiment, Figure 11 and Figure 12 In this configuration, each magnetic assembly 22 includes two magnets, namely a first magnet 221 and a second magnet 222. The first magnet 221 is connected between the magnetic pole plate 21 and the second magnet 222. The side of the first magnet 221 facing the magnetic pole plate 21 is the N pole, and the side of the first magnet 221 facing away from the magnetic pole plate 21 is the S pole. The side of the second magnet 222 facing the first magnet is the N pole, and the side of the second magnet 222 facing away from the first magnet is the S pole.

[0100] In some alternative embodiments, when the magnetic assembly 22 includes a first magnet 221 and a second magnet 222, the size of the magnetic assembly 22 in the first direction X is larger, therefore, as Figure 11 and Figure 12 As shown, the support shell 1 is usually provided with a mounting hole 19, and at this time, part of the second magnet 222 is located in the mounting hole 19.

[0101] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the support shell 1 is also provided with a weight reduction hole 1b, which is used to reduce the weight of the support shell 1 to meet the requirements of the speaker's lightweight design. In addition, the weight reduction hole 1b is also used to ensure that the sound inside the support shell 1 is transmitted smoothly.

[0102] In some embodiments, such as Figures 10 to 12 As shown, when the support shell 1 includes a first shell 16 and a second shell 17, both the first shell 16 and the second shell 17 are provided with weight reduction holes 1b.

[0103] In some embodiments, when the support shell 1 includes a support plate 13 and an annular support member 14, the support plate 13 is provided with a weight reduction hole 1b.

[0104] In one or more embodiments of this application, such as Figures 1 to 12 As shown, both the magnetic circuit system 2 and the vibration system 3 are equipped with one set.

[0105] In some other optional embodiments, the magnetic circuit system 2 and the vibration system 3 may be provided in multiple sets, one for each other. Each set of magnetic circuit systems 2 is at least partially disposed within the support shell 1. At least one end of each magnetic circuit system 2 in the first direction X is connected to the support shell 1. The diaphragm 31 and voice coil 32 of the vibration system 3 are disposed opposite to the corresponding magnetic circuit system 2 in a direction perpendicular to the first direction X. The diaphragm 31 is disposed around the outside of the corresponding magnetic circuit system 2, and the inner periphery of the diaphragm 31 is connected to the corresponding magnetic circuit system 2. The voice coil 32 is disposed around the outside of the corresponding magnetic circuit system 2.

[0106] In some embodiments, multiple sets of magnetic circuit systems 2 are arranged at intervals. For example, the multiple sets of magnetic circuit systems 2 may be arranged at intervals along the length direction, width direction, or other directions of the support shell 1. By setting multiple sets of magnetic circuit systems 2, the magnets of each set of magnetic circuit systems 2 do not need to be designed to be too long, thereby improving the rigidity of the magnets.

[0107] In this embodiment, the magnetic circuit system 2 is provided in two sets, and the two sets of magnetic circuit systems 2 are arranged at intervals along the length direction of the support shell 1.

[0108] In at least one embodiment, the diaphragms 31 of multiple vibration systems 3 are interconnected as a whole. This arrangement improves the overall integrity of the diaphragms 31 and facilitates their assembly. It should be noted that the vibrating plates 314 of the diaphragms 31 are connected as a whole, and the structure between the vibrating plates 314 forms reinforcing ribs to increase their rigidity. Furthermore, by providing multiple vibration systems 3, the effective vibration area of ​​the diaphragms 31 can be effectively increased, thereby improving the efficiency of the diaphragms 31 in driving air, resulting in higher sound pressure levels and sensitivity, better low-frequency extension and volume, lower nonlinear distortion, and lower power compression.

[0109] Optionally, in this embodiment, the voice coils 32 of the multiple sets of vibration systems 3 are independent of each other, and each voice coil 32 is electrically connected to a conductive structure 4.

[0110] It should be noted that the magnets in the multiple magnetic circuit systems 2 are arranged identically, ensuring that the generated magnetic fields do not interfere with each other. Furthermore, the input signals to the multiple voice coils 32 are also completely identical, guaranteeing that the driving amplitude and frequency of the diaphragm 31 are the same, thus ensuring sound quality.

[0111] The speaker provided in this embodiment has a simple overall structure, is easy to assemble, and has a low cost.

[0112] Obviously, the above embodiments of this application are merely examples for clear illustration and are not intended to limit the implementation of this application. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A loudspeaker, characterized in that, include: Support shell; A magnetic circuit system, at least a portion of which is disposed within and connected to the support housing; A vibration system is disposed around the outer periphery of the magnetic circuit system. The vibration system includes a diaphragm and a voice coil connected to the diaphragm. The diaphragm includes a first diaphragm portion and a second diaphragm portion connected to each other. The second diaphragm portion has a folded ring structure. The folded ring protrusion of the second diaphragm portion is perpendicular to the vibration direction of the first diaphragm portion. The first diaphragm portion is connected to the support shell, and the second diaphragm portion is connected to the support shell or the magnetic circuit system. The voice coil is energized and interacts with the magnetic circuit system to drive the diaphragm to vibrate.

2. The loudspeaker according to claim 1, characterized in that, The first diaphragm portion is annular, and the second diaphragm portion is connected to the inner or outer periphery of the first diaphragm portion; And / or, at least a portion of the orthographic projection of the second diaphragm portion along the vibration direction of the first diaphragm portion overlaps with the orthographic projection of the first diaphragm portion along the vibration direction of the first diaphragm portion.

3. The loudspeaker according to claim 1, characterized in that, The diaphragm further includes a third diaphragm portion, which is disposed on the side of the first diaphragm portion away from the second diaphragm portion, and the third diaphragm portion is connected to the first diaphragm portion. The first diaphragm portion is connected to the support shell and / or the magnetic circuit system through the third diaphragm portion. The third diaphragm portion has a folded ring structure, and the folded ring protrusion of the third diaphragm portion is in the same direction as the vibration direction of the first diaphragm portion.

4. The loudspeaker according to claim 3, characterized in that, In a direction perpendicular to the vibration direction of the first diaphragm portion, the third diaphragm portion is disposed on the side of the second diaphragm portion away from the magnetic circuit system, the outer periphery of the third diaphragm portion is connected to the support shell, and the second diaphragm portion is connected to the magnetic circuit system and / or the support shell; Alternatively, in a direction perpendicular to the vibration direction of the first diaphragm portion, the third diaphragm portion is disposed on the side of the second diaphragm portion near the magnetic circuit system, the inner periphery of the third diaphragm portion is connected to the magnetic circuit system, and the second diaphragm portion is connected to the support shell.

5. The loudspeaker according to claim 1, characterized in that, The second diaphragm portion is disposed on one side of the first diaphragm portion in a first direction; wherein, the first direction is the vibration direction of the first diaphragm portion. The diaphragm further includes a vibrating plate, which is disposed on the side of the first diaphragm portion away from the second diaphragm portion in a first direction and is attached to the first diaphragm portion. The voice coil and the diaphragm are arranged in a direction perpendicular to the first direction, and the voice coil is connected to the diaphragm.

6. The loudspeaker according to any one of claims 1-5, characterized in that, The support shell includes a support plate and an annular support member connected to one side of the support plate. The annular support member and the support plate cooperate to form an installation space. The second diaphragm portion is located in the installation space and is connected to the magnetic circuit system and / or the support plate. At least a portion of the magnetic circuit system is located in the installation space and is connected to the support plate.

7. The loudspeaker according to any one of claims 1-5, characterized in that, The support shell includes a first shell and a second shell arranged and connected to each other along the vibration direction of the first diaphragm portion. The first shell and the second shell cooperate with each other to form a receiving cavity. The magnetic circuit system and the vibration system are both disposed in the receiving cavity. One end of the magnetic circuit system in the vibration direction of the first diaphragm is connected to the first housing, and the other end of the magnetic circuit system in the vibration direction of the first diaphragm is connected to the second housing; the second diaphragm is connected to at least one of the first housing, the second housing, and the magnetic circuit system.

8. The loudspeaker according to any one of claims 1-5, characterized in that, The magnetic circuit system includes a magnetic pole plate and magnetic assemblies. The magnetic pole plate is connected to the magnetic assemblies on both sides of the first diaphragm in the vibration direction. At least one of the two magnetic assemblies is connected to the support shell. The second diaphragm is connected to one of the magnetic assemblies and / or the support shell. The two magnetic groups are symmetrically arranged with the magnetic pole plate as the center of symmetry; and / or, the magnetic poles of the two magnetic groups are symmetrically arranged with the magnetic pole plate as the center of symmetry.

9. The loudspeaker according to any one of claims 1-5, characterized in that, The support shell has a mounting hole that penetrates the shell wall, and at least part of the magnetic circuit system is disposed in the mounting hole, and the magnetic circuit system abuts against the wall of the mounting hole.

10. The loudspeaker according to any one of claims 1-5, characterized in that, The surface of the diaphragm is provided with a conductive structure, which is electrically connected to the voice coil.

11. The loudspeaker according to any one of claims 1-5, characterized in that, The inner wall of the support shell is provided with a groove, and the second diaphragm part is provided with a first extension part at the edge away from the first diaphragm part in the vibration direction of the first diaphragm part. The first extension part is disposed in the groove and connected to the support shell.

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