Loudspeaker module and earphone

Abstract

The application discloses a loudspeaker module and earphones, and relates to the technical field of electronic products. The loudspeaker module has good sound emission effect and small volume. The loudspeaker module comprises a first loudspeaker unit and a second loudspeaker unit. The first loudspeaker unit comprises a first basket, a first diaphragm group, a first voice coil and a first magnetic circuit system. The first diaphragm group is supported on the first basket. The first voice coil is fixed on the first diaphragm group. The first magnetic circuit system is fixed on the first basket. The first voice coil cooperates with the first magnetic circuit system to drive the first diaphragm group to vibrate. The second loudspeaker unit is arranged on the side of the first magnetic circuit system away from the central axis of the first loudspeaker unit. A plane perpendicular to the central axis of the first loudspeaker unit is defined as a reference plane. The orthographic projection of the second loudspeaker unit on the reference plane is a first projection. The orthographic projection of the first basket on the reference plane is a second projection. The first projection and the second projection overlap.

Description

Technical Field

[0001] This application relates to the field of electronic product technology, and in particular to a speaker module and headphones. Background Technology

[0002] In the use of electronic products, headphones have become an essential accessory to allow users to hear the sound information provided by the electronic products without disturbing others. However, due to the limited space inside the headphones, the structure of the speaker module is greatly restricted, resulting in poor sound quality, which needs further improvement. Summary of the Invention

[0003] This application provides a speaker module and headphones that have good sound output and small size.

[0004] To achieve the above objectives, the embodiments of this application adopt the following technical solutions: In a first aspect, this application provides a loudspeaker module comprising: a first loudspeaker unit and a second loudspeaker unit. The first loudspeaker unit includes a first frame, a first diaphragm assembly, a first voice coil, and a first magnetic circuit system. The first diaphragm assembly is supported on the first frame, the first voice coil is fixed to the first diaphragm assembly, and the first magnetic circuit system is fixed to the first frame. The first voice coil and the first magnetic circuit system cooperate to drive the first diaphragm assembly to vibrate. The second loudspeaker unit is located on the side of the first magnetic circuit system away from the central axis of the first loudspeaker unit. That is, the second loudspeaker unit is located on the outer periphery of the first magnetic circuit system. A plane perpendicular to the central axis of the first loudspeaker unit is defined as a reference plane. The orthographic projection of the second loudspeaker unit onto the reference plane is the first projection, and the orthographic projection of the first frame onto the reference plane is the second projection. The first projection and the second projection overlap.

[0005] In this way, by placing the second speaker unit on the outer periphery of the first magnetic circuit system—that is, arranging the second speaker unit and the first magnetic circuit system in a plane perpendicular to the central axis of the first speaker unit, and ensuring that the first and second projections overlap—the space around the first magnetic circuit system can be cleverly utilized. This allows for the integration of multiple speaker units into one unit while reducing the circumferential dimensions of the speaker module, thereby reducing its overall size and facilitating assembly within the limited space of headphones. Furthermore, by placing the second speaker unit on the outer periphery of the first magnetic circuit system, interference between the second speaker unit and the first diaphragm assembly can be avoided. This reduces the overall size of the speaker module while maintaining the effective vibration area of ​​the first diaphragm assembly of the first speaker unit, improving the sound output performance of the first speaker unit.

[0006] In one possible design approach of the first aspect, the first projection is located within the outer contour of the second projection. This further reduces the circumferential dimension of the speaker module, thereby enabling the integration of the second speaker unit and the first speaker unit into one unit without increasing the circumferential dimension of the speaker module, achieving sound output from multiple speaker units and improving the sound effect of the speaker module.

[0007] In one possible design of the first aspect, the reference plane is located on the side of the first diaphragm assembly facing away from the first magnetic circuit system. The maximum distance between the end face of the second speaker unit away from the reference plane and the reference plane is a first distance, and the maximum distance between the end face of the first magnetic circuit system away from the reference plane and the reference plane is a second distance. The first distance is less than or equal to the second distance. This reduces the axial dimension of the speaker module, making it equal to the axial dimension of the first speaker unit. Therefore, the second speaker unit and the first speaker unit can be integrated into one unit without increasing the axial dimension of the speaker module, enabling multiple speaker units to produce sound and improving the sound effect of the speaker module.

[0008] In one possible design of the first aspect, the first speaker frame includes a first bottom wall and a first peripheral wall. The first bottom wall is annular, and a first magnetic circuit system is fixed to the inner edge of the first bottom wall. A mounting space is defined between the surface of the first bottom wall facing away from the first diaphragm assembly and the outer peripheral surface of the first magnetic circuit system, and the second speaker unit is fixed within the mounting space. The first peripheral wall is arranged around the outer edge of the first bottom wall, and the first diaphragm assembly is supported on the first peripheral wall. The structure is simple and easy to manufacture.

[0009] In one possible design of the first aspect, the surface of the first bottom wall facing away from the first diaphragm assembly is provided with a limiting groove recessed toward the first diaphragm assembly, and at least a portion of the second speaker unit is disposed within the limiting groove. This allows the second speaker unit to be positioned within the limiting groove, and also reduces the space occupied by the second speaker unit in the axial direction of the speaker module, thus facilitating a reduction in the axial dimension of the speaker module.

[0010] In one possible design of the first aspect, the first basin stand further includes an annular flange disposed on the second wall surface of the first bottom wall and surrounding the outer periphery of the through opening. The shape of the annular flange is adapted to the shape of the outer periphery of the first magnetic circuit system. In this way, the first basin stand can be connected to the first magnetic circuit system by means of the annular flange, thereby increasing the connection strength between the first basin stand and the first magnetic circuit system.

[0011] In one possible design of the first aspect, the second speaker unit is one.

[0012] In one possible design of the first aspect, there are multiple second speaker units, which are arranged circumferentially in the first magnetic circuit system. Here, "multiple" in this application refers to two or more. This improves the sound output performance of the speaker module.

[0013] In one possible design of the first aspect, there are two second speaker units, symmetrically arranged on both sides of the first magnetic circuit system. This ensures good structural symmetry of the speaker module, which is beneficial for improving the sound output performance of the speaker module.

[0014] In one possible design of the first aspect, the first magnetic circuit system includes a first profile surface, and the second loudspeaker unit is disposed on the outer periphery of the first profile surface.

[0015] In one possible design of the first aspect, the second speaker unit includes a second profile surface that is adapted to the first profile surface. This adaptation facilitates a closer fit between the second and first profile surfaces, resulting in a more compact speaker module structure and allowing for a larger overall volume of the second speaker unit.

[0016] In one possible design of the first aspect, the first profile surface is formed as a plane. In this way, the planar first profile surface can be used to avoid the second speaker unit, providing installation space for the arrangement of the second speaker unit.

[0017] In one possible design of the first aspect, there are two first contour surfaces, symmetrically arranged on both sides of the first magnetic circuit system. This simplifies the structure of the first magnetic circuit system and improves its symmetry, which helps to enhance the uniformity of the driving force provided by the first magnetic circuit system to the first diaphragm assembly. This, to a certain extent, avoids the problem of polarization or rolling vibration of the first diaphragm assembly caused by uneven force distribution.

[0018] In one possible design of the first aspect, the two first profile surfaces are parallel to each other. This further improves the structural symmetry of the first magnetic circuit system and provides more installation space for the second speaker unit, facilitating its placement.

[0019] In one possible design of the first aspect, two first contour surfaces define a first opening and a second opening circumferentially in the first magnetic circuit system. The outer circumferential surface of the first magnetic circuit system also includes a third contour surface disposed at the first opening and a fourth contour surface disposed at the second opening. The third and fourth contour surfaces are symmetrically disposed on both sides of the first magnetic circuit system. This makes the structure of the first magnetic circuit system simple and symmetrical, which is beneficial to improving the uniformity of the driving force provided by the first magnetic circuit system to the first diaphragm assembly, thereby avoiding to some extent the problem of polarization or rolling vibration of the first diaphragm assembly caused by uneven force on the first diaphragm assembly.

[0020] In one possible design of the first aspect, both the third and fourth contour surfaces are formed as arched surfaces that curve away from the central axis of the first magnetic circuit system. This increases the overall volume of the first magnetic circuit system, which is beneficial for increasing the driving strength of the first magnetic circuit system on the first diaphragm assembly, thereby improving the sound output performance of the first speaker unit.

[0021] In one possible design of the first aspect, both the third and fourth profile surfaces are formed as planes, and the outer periphery of the first magnetic circuit system is formed as a rectangle or a square.

[0022] In one possible design of the first aspect, the first magnetic circuit system has a magnetic gap whose extension path is the same as the extension path of the outer periphery of the first magnetic circuit system, and the magnetic gap is adapted to the first voice coil. This allows for a more compact structure of the first magnetic circuit system, which is beneficial for increasing the driving strength of the first diaphragm assembly, thereby improving the sound output performance of the speaker module. Simultaneously, it helps ensure the reliability of the fit between the first voice coil and the first magnetic circuit system. Therefore, when the first voice coil and the first magnetic circuit system work together to drive the first diaphragm assembly to vibrate, it can help ensure the uniformity of the driving force of the first diaphragm assembly in the circumferential direction of the first frame, at least to some extent avoiding the problem of rolling vibration in the first diaphragm assembly.

[0023] In one possible design of the first aspect, the magnetic gap includes a first gap portion, a second gap portion, a third gap portion, and a fourth gap portion connected end-to-end. The extension paths of the first gap portion and the third gap portion along the circumferential direction of the first magnetic circuit system are the same as the extension path of the first contour surface. The extension path of the second gap portion along the circumferential direction of the first magnetic circuit system is the same as the extension path of the third contour surface. The extension path of the fourth gap portion along the circumferential direction of the first magnetic circuit system is the same as the extension path of the fourth contour surface. This allows for a more compact structure of the first magnetic circuit system, which is beneficial for increasing the driving strength of the first diaphragm assembly, thereby improving the sound output performance of the speaker module.

[0024] In one possible design of the first aspect, the first and third gaps extend in a straight line in the circumferential direction of the first magnetic circuit system, while the second and fourth gaps extend in an arc in the circumferential direction of the first magnetic circuit system. This design is simple in structure and easy to manufacture.

[0025] In one possible design of the first aspect, the first voice coil includes a first segment, a second segment, a third segment, and a fourth segment connected end-to-end. The first segment is fitted with a first gap, the second segment with a second gap, the third segment with a third gap, and the fourth segment with a fourth gap. This helps ensure the reliability of the fit between the first voice coil and the first magnetic circuit system. Consequently, when the first voice coil and the first magnetic circuit system work together to drive the first diaphragm assembly to vibrate, it helps to ensure the uniformity of the driving force of the first diaphragm assembly in the circumferential direction of the first frame, and at least to some extent avoids the problem of rolling vibration of the first diaphragm assembly.

[0026] In one possible design of the first aspect, the first and third segments are both formed as flat plates, and the second and fourth segments are formed as arc-shaped plates that arch away from the central axis of the first speaker unit.

[0027] In one possible design of the first aspect, the first voice coil is an axisymmetric shape. This is beneficial for the uniformity of the driving force of the first diaphragm assembly in the circumferential direction of the first frame, and at least to some extent avoids the problem of rolling vibration of the first diaphragm assembly.

[0028] In one possible design of the first aspect, the outer periphery of the first magnetic circuit system is elliptical or circular.

[0029] In one possible design of the first aspect, the first diaphragm assembly includes a first dome, the first dome including a flat portion formed in the shape of a plate, and the first voice coil is fixed on the flat portion. Thus, by providing a flat portion on the first dome, it is easier to assemble the first voice coil on the first dome, which helps to reduce the assembly difficulty of the first voice coil.

[0030] In one possible design of the first aspect, the first dome further includes a protrusion located inside and connected to the flat portion, the protrusion protruding in a direction away from the first magnetic circuit system. This is beneficial for increasing the vibration amplitude of the first diaphragm assembly, thereby improving the sound output performance of the speaker module.

[0031] In one possible design of the first aspect, the first voice coil surrounds the outer periphery of the protrusion, and the outer contour shape of the orthographic projection of the protrusion onto the reference plane is the same as the shape of the first voice coil. Therefore, by setting the outer contour of the orthographic projection of the protrusion onto the plane containing the flat portion to be the same as the shape of the first voice coil, the uniformity of force on the first diaphragm assembly can be improved when the first voice coil drives the first diaphragm assembly to vibrate, thereby avoiding to some extent the problem of polarization or rolling vibration of the first diaphragm assembly caused by uneven force distribution.

[0032] In one possible design of the first aspect, the first speaker unit has a first sound outlet, and the second speaker unit has a second sound outlet, with the sound outlet direction of the first sound outlet being consistent with that of the second sound outlet. This ensures that the acoustic paths of both the first and second speaker units are unobstructed while reducing the phase difference between the sound waves output by the two speaker units, thereby improving the sound quality of the speaker module.

[0033] In one possible design of the first aspect, the second speaker unit is a moving iron speaker or a planar speaker.

[0034] In one possible design of the first aspect, the speaker module further includes a sound outlet duct, which has a first sound outlet channel and a second sound outlet channel. One end of the first sound outlet channel is connected to a first sound outlet, and the other end of the first sound outlet channel extends in a direction away from the first speaker unit. One end of the second sound outlet channel is connected to a second sound outlet, and the other end of the second sound outlet channel extends in a direction away from the first speaker unit, and the second sound outlet channel is separated from the first sound outlet channel. In this way, the sound emitted from the first sound outlet of the first speaker unit can be transmitted to the headphone output port via the first sound outlet duct, and the sound emitted from the second sound outlet of the second speaker unit can be transmitted to the headphone output port via the second sound outlet duct. Because the first and second sound outlet channels are separated from each other, interference between the sound emitted by the first speaker unit and the sound emitted by the second speaker unit can be avoided, effectively improving the sound effect of the speaker module.

[0035] In one possible design of the first aspect, the sound outlet duct includes: a first sound outlet tube and a second sound outlet tube. The first sound outlet tube is located on the side of the first frame away from the first diaphragm assembly, and a first sound outlet channel is defined within the first sound outlet tube. The second sound outlet tube is sleeved outside the first sound outlet tube and spaced apart from the first sound outlet tube, and a second sound outlet channel is defined between the second sound outlet tube and the first sound outlet tube. The structure is simple and easy to manufacture.

[0036] In one possible design of the first aspect, the first sound outlet tube includes a first tube segment and a second tube segment. One axial end of the first tube segment is connected to a first frame, and the other axial end of the first tube segment extends in a direction away from the first frame. The second tube segment is connected to the other axial end of the first tube segment and extends in a direction away from the first frame. The first tube segment can be formed as a cylindrical tubular structure, and the second tube segment can be formed as a tapered tubular structure. The structure is simple and easy to manufacture.

[0037] In one possible design approach of the first aspect, the first speaker unit and the second speaker unit have different sound emission frequencies. Specifically, the first speaker unit can be a woofer, and the second speaker unit can be a tweeter. This allows the speaker module to have good performance in both the low-frequency and high-frequency ranges, which is beneficial to improving the sound quality of the speaker module.

[0038] Secondly, this application provides an earphone, including: a shell and a speaker module, wherein a sound outlet is formed on the shell; the speaker module is a speaker module of any of the above-mentioned technical solutions, the speaker module is disposed inside the shell, and the sound signal generated by the first speaker unit and the sound signal generated by the second speaker unit are both output from the sound outlet.

[0039] Thirdly, this application provides an earphone, comprising: a housing and a speaker module, wherein a sound outlet is formed on the housing; the speaker module is a speaker module of any of the above-mentioned technical solutions, the speaker module is disposed inside the housing, and the sound signal generated by the first speaker unit and the sound signal generated by the second speaker unit are both output through the sound outlet. The housing is provided with a first sound outlet channel and a second sound outlet channel that are separated from each other, the first sound outlet channel being used to connect the first sound outlet hole and the sound outlet, and the second sound outlet channel being used to connect the second sound outlet hole and the sound outlet.

[0040] In one possible implementation of the third aspect, the housing includes a front housing and a rear housing. The front housing forms a sound outlet, and the rear housing is connected to the front housing. The rear housing and the front housing enclose a receiving space, within which the speaker module is disposed. Thus, by configuring the housing as a front housing and a rear housing, the processing and assembly of the housing are facilitated.

[0041] In one possible implementation of the third aspect, the headphone's mainboard is housed within an accommodating space, and the speaker module is electrically connected to the mainboard, with the speaker module located on the side of the mainboard closer to the sound outlet. This allows the speaker module to acquire audio signals such as music and voice, while preventing the mainboard from interfering with the speaker module's sound output.

[0042] In one possible implementation of the third aspect, a first receiving cavity is formed inside the front housing, and the speaker module is disposed inside the first receiving cavity.

[0043] In one possible implementation of the third aspect, the front shell includes a main body and an extension, the extension being located on one side of the main body and extending away from the main body, a first receiving cavity being formed inside the main body, and a sound outlet being formed on the extension.

[0044] In one possible implementation of the third aspect, the rear shell includes a cover and a rod. The cover is connected to the front shell, and the rod is disposed on the side of the cover away from the front shell. A second receiving cavity is formed inside the cover. The second receiving cavity is connected to the first receiving cavity, and the first and second receiving cavities together form the aforementioned accommodating space.

[0045] Understandably, the beneficial effects that the headphones described in the second and third aspects above can achieve can be referenced to the beneficial effects in the first aspect and any of its possible design embodiments, which will not be repeated here. Attached Figure Description

[0046] Figure 1 This application provides schematic diagrams of the structure of headphones according to some embodiments; Figure 2 for Figure 1 The diagram shows the exploded structure of the headphones. Figure 3 for Figure 1 A schematic diagram of a cross-sectional structure of the speaker module inside the earphone shown. Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure of the core of the speaker module shown; Figure 5 Cross-sectional views of a portion of the structure of the earphone provided in other embodiments of this application; Figure 6a A three-dimensional structural schematic diagram of a speaker module provided in other embodiments of this application; Figure 6b for Figure 6a An exploded view of the speaker module shown; Figure 6c for Figure 6a A top view of the speaker module shown; Figure 6d For along Figure 6c Sectional view of line AA in the middle; Figure 6e for Figure 6a The diagram shows the assembly of the speaker module and the earphone housing. Figure 7a Schematic diagrams of the structure of the first projection and the second projection provided in some embodiments of this application; Figure 7b Schematic diagrams of the structure of the first projection and the second projection provided in some embodiments of this application; Figure 8a for Figure 6b A perspective view of the first speaker unit in the speaker module shown; Figure 8b for Figure 8a Exploded view of the first speaker unit shown; Figure 8c For along Figure 8a Sectional view of the middle BB line; Figure 9a for Figure 8b A perspective view of the first speaker unit's first frame shown; Figure 9b for Figure 9a A perspective view of the first pot stand shown from another angle; Figure 9c For along Figure 9a A cross-sectional view of the CC line; Figure 10a for Figure 8b A perspective view of the first magnetic circuit system in the first loudspeaker unit shown; Figure 10b For along Figure 6a Sectional view of the DD line; Figure 10c for Figure 10a Exploded view of the first magnetic circuit system shown; Figure 10d For along Figure 10a Sectional view of the EE line; Figure 11 for Figure 10a The first magnetic circuit system shown is with Figure 9a The diagram shows the assembly of the first basin stand. Figure 12 for Figure 8b A perspective view of the first voice coil in the first loudspeaker unit shown in the figure; Figure 13 for Figure 12 The first voice coil shown is Figure 10a A schematic diagram of the first magnetic circuit system shown in the figure; Figure 14a for Figure 8b A schematic diagram of one structure of the first diaphragm assembly in the first loudspeaker unit shown; Figure 14b for Figure 14a The first diaphragm assembly shown is... Figure 12 A schematic diagram of the assembly structure of the first voice coil shown in the figure; Figure 14c for Figure 14b A magnified view of region M in the middle; Figure 15a for Figure 6a A perspective view of the second speaker unit shown in the figure; Figure 15b for Figure 15a A cross-sectional view of the second speaker unit shown; Figure 16 for Figure 6a Another perspective view of the speaker module shown; Figure 17a for Figure 15a A perspective view of the second diaphragm assembly of the second speaker unit shown in the image; Figure 17b for Figure 15b Enlarged view of the N-section region; Figure 18 for Figure 15a A schematic diagram of the reed structure of the second speaker unit shown; Figure 19 for Figure 15b A schematic diagram of the second magnetic circuit system of the second speaker unit shown in the figure; Figure 20a A perspective view of a speaker module provided in other embodiments of this application; Figure 20b for Figure 20a A cross-sectional schematic diagram of the speaker module shown; Figure 21 A cross-sectional schematic diagram of a speaker module provided in some embodiments of this application; Figure 22 A cross-sectional schematic diagram of a speaker module provided in some embodiments of this application; Figure 23 A cross-sectional schematic diagram of a speaker module provided in some embodiments of this application; Figure 24 A cross-sectional schematic diagram of a speaker module provided in some embodiments of this application; Figure 25 Exploded view of a first speaker unit provided for some embodiments of this application; Figure 26 for Figure 25 The diagram shows the assembly of the first speaker unit and the second speaker unit. Figure 27 for Figure 25 Another assembly diagram of the first speaker unit and the second speaker unit shown in the figure; Figure 28 A cross-sectional view of a first speaker unit provided for other embodiments of this application; Figure 29a A perspective view of a speaker module provided in other embodiments of this application; Figure 29b for Figure 29a A top view of the speaker module shown; Figure 29c For along Figure 29b Sectional view of the middle FF line; Figure 29d For along Figure 29b A cross-sectional view of the GG line in the middle; Figure 29e For along Figure 29a A 3D view of the sound output channel in the speaker module shown; Figure 29f for Figure 29a The speaker module shown is applied to the headphone in a cross-sectional view.

[0047] Figure label: 1. Outer shell; 10. Accommodating space; 11. Front shell; 101. First accommodating cavity; 110. Sound outlet; 111. Main body; 112. Extension; 1121. Limiting rib; 12. Rear shell; 102. Second accommodating cavity; 121. Cover; 122. Rod; 1221. Charging contact; 13. Contact sleeve; 2. Motherboard; 3. Battery; 4. Speaker module; 41. Housing; 411. Front cavity; 412. Rear cavity; 41a. Sound outlet channel; 42. Core; 420a. Diaphragm; 420b. Voice coil; 420c. Magnetic circuit system; 420d. Frame; S, reference plane; S1, first projection; S2, second projection; 4a. First loudspeaker unit; C1. First front cavity; C2. First rear cavity; 401. First sound outlet; 43. First basin stand; 431. First bottom wall; 4311. First wall surface; 4312. Second wall surface; 4312a. Limiting groove; 4313. Through opening; 4313a. First inner surface; 4313b. Second inner surface; 4313c. Third inner surface; 4313d. Fourth inner surface; 432. First peripheral wall; 4321. First end face; 4322. Second end face; 4323. First fixing lug; 433. Annular flange; 44. First diaphragm assembly; 441. First dome; 4411. First fixing part; 4412. Flat part; 4412a. First top surface; 4412b. First bottom surface; 4413. Protrusion; 442. First diaphragm; 4421. First connecting part; 4421a. Second top surface; 4421b. Second bottom surface; 4422. First folded ring; 4423. Second connecting part; 4423a. Third top surface; 4423b. Third bottom surface; 4423d. Second fixing lug; 45. First voice coil; 45a. Top surface of voice coil; 45b. Bottom surface of voice coil; 451. First segment; 452. Second segment; 453. Third segment; 454. Fourth segment; 46. ​​First magnetic circuit system; 46a. First profile surface; 46b. Third profile surface; 46c. Fourth profile surface; 461. Magnetic bowl; 4611. Base plate; 4612. Side plate; 462. Central magnet; 462a. First outer peripheral surface; 462b. Second outer peripheral surface; 462c. Third outer peripheral surface; 462d. Fourth outer peripheral surface; 463. Magnetic yoke; 464. Auxiliary magnet; 465, Magnetic gap; 465a, First gap section; 465b, Second gap section; 465c, Third gap section; 465d, Fourth gap section; 4b, Second loudspeaker unit; 4b0, Second profile surface; D1, Second front cavity; D2, Second rear cavity; 402, Second sound outlet; 47. Protective shell; 471. First wall panel; 472. Second wall panel; 473. Third wall panel; 474. Stepped portion; 47a. First shell portion; 47b. Second shell portion; 48. Second diaphragm assembly; 481. Second fixing part; 482. Second folded ring; 483. Second dome; 49. Second magnetic circuit system; 491. Magnetic conductive part; 492. Magnet part; 492a. First magnet part; 492b. Second magnet part; 4b1, reed; 4b11, first reed body; 4b12, second reed body; 4b13, connecting reed body; 4b14, support body; 4b2, transmission rod; 4b3, second voice coil; 4c, sound outlet pipe; 4c1, first sound outlet channel; 4c2, second sound outlet channel; 4c3, First sound outlet pipe; 4c31, First pipe section; 4c32, Second pipe section; 4c33, First notch; 4c4, second sound outlet pipe; 4c41, third pipe section; 4c42, fourth pipe section; 4c43, second notch. Detailed Implementation

[0048] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0049] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The directional terms mentioned in the embodiments of this application, such as "front," "rear," "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. "Multiple" refers to two or more.

[0050] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0051] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0052] This application provides an earphone that can be used with electronic products such as mobile phones, tablets, and laptops to receive sound information provided by the electronic products and output it to the user. By using the earphone with electronic products, the sound from the electronic products can be prevented from disturbing others. The earphone can be wireless or wired.

[0053] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the earphone 100 provided in some embodiments of this application. Figure 2 yes Figure 1 An exploded view of the headphone 100. The headphone 100 can be either a wireless headphone or a wired headphone. Figure 1 and Figure 2 The illustrated earphone 100 is a wireless earphone as an example. The earphone 100 may include a housing 1, a motherboard 2, a battery 3, and a speaker module 4.

[0054] Understandable Figure 1 , Figure 2 The accompanying drawings below only schematically illustrate some of the components included in the earphone 100; the actual shape, size, position, and construction of these components are not subject to change. Figure 1 , Figure 2 As well as the accompanying drawings below. Furthermore, when the earphone 100 is a wired earphone, the wired earphone may not include the battery 3.

[0055] The outer shell 1 has a housing space 10, which serves as a carrier for the functional components of the earphone 100, protecting the functional components located within the housing space 10. Furthermore, when a user wears the earphone 100, the earphone 100 contacts the user's ear through the outer shell 1. Therefore, to improve the user's comfort when wearing the earphone 100, the outer shell 1 can be shaped to fit the shape of the human ear.

[0056] Since the outer shell 1 is directly exposed to the external environment and comes into contact with the user's ear, or the earphone 100 comes into contact with other external structures through the outer shell 1, it is inevitable that the outer surface of the outer shell 1 will suffer from scratches, corrosion, and other problems. To avoid this technical problem, the outer shell 1 can have certain properties such as wear resistance, corrosion resistance, and scratch resistance, or a layer of functional material for wear resistance, corrosion resistance, and scratch resistance can be coated on the outer surface of the outer shell 1.

[0057] The inner circumferential surface of the outer shell 1 is a curved surface extending circumferentially along the outer shell 1. In some examples, the inner circumferential surface of the outer shell 1 is an arcuate surface extending circumferentially along the outer shell 1. As another example, the inner circumferential surface of the outer shell 1 is an elliptical arcuate surface extending circumferentially along the outer shell 1. In other examples, the inner circumferential surface of the outer shell 1 can also be a combination of an arcuate surface and an elliptical arcuate surface, as long as the inner circumferential surface of the outer shell 1 is curved. This design ensures that the overall shape of the outer shell 1 fits the human ear while increasing the volume of the accommodating space 10 inside the outer shell 1, so that more functional devices can be integrated into the earphone 100.

[0058] In some embodiments, the outer shell 1 can be a structural unit, that is, the outer shell 1 can be a one-piece molded part, and the one-piece molded outer shell 1 has higher structural strength.

[0059] In other embodiments, the outer casing 1 may also be formed by assembling multiple parts. Please continue reading. Figure 1 and Figure 2In this embodiment, the outer shell 1 may include a front shell 11 and a rear shell 12. The front shell 11 faces the user's ear when the earphone 100 is in use, and the rear shell 12 faces away from the user's ear. The outer shell 1 is formed by assembling the front shell 11 and the rear shell 12. This facilitates the separate processing of the front shell 11 and the rear shell 12, simplifies the mold structure of the front shell 11 and the rear shell 12, reduces the molding difficulty of the front shell 11 and the rear shell 12, and consequently reduces the manufacturing difficulty of the outer shell 1. Specifically, the front shell 11 can be fixedly connected to the rear shell 12 by a snap-fit ​​method. The front shell 11 can also be connected to the rear shell 12 by screws. Alternatively, in other embodiments, the front shell 11 can also be fixedly connected to the rear shell 12 by glue or tape.

[0060] The front shell 11 can be made of materials including but not limited to hard plastic, metal, and a combination of plastic and metal. To achieve a lightweight design for the Headphones 100, the front shell 11 can be made of hard plastic.

[0061] Please see Figure 2 A first receiving cavity 101 is formed inside the front shell 11, and the side of the first receiving cavity 101 adjacent to the rear shell 12 is open. A sound outlet 110 communicating with the first receiving cavity 101 is formed on the front shell 11, and the sound of the earphone 100 can be conducted to the outside of the earphone 100 through the sound outlet 110.

[0062] Specifically, the front housing 11 may include a main body 111 and an extension 112. The extension 112 may be located on one side of the main body 111 and extend in a direction away from the main body 111. See also Figure 2 The first receiving cavity 101 can be formed inside the main body 111, and the extension 112 can form the sound outlet 110. It is understood that in some other embodiments, the front shell 11 may not include the extension 112, but instead the sound outlet 110 is directly formed on the wall of the main body 111.

[0063] To improve user comfort when wearing the headphones 100, the headphones 100 may also be provided with a contact sleeve 13, which can be used to contact the user's ear. For example, the contact sleeve 13 may surround the outer peripheral surface of the extension 112, and the contact sleeve 13 may be similar in shape to the human ear canal to improve the fit of wearing the headphones 100. At the same time, the contact sleeve 13 may be made of flexible materials such as silicone and rubber to improve user comfort when wearing the headphones 100.

[0064] Please see Figure 2A limiting rib 1121 can be formed on the outer peripheral surface of the extension 112, so that when the contact sleeve 13 surrounds the outer peripheral surface of the extension 112, the limiting rib 1121 can abut against the contact sleeve 13, thereby limiting the contact sleeve 13 and reducing the probability of the contact sleeve 13 falling off the extension 112 naturally. Of course, in order to reduce costs, the earphone 100 may not include the contact sleeve 13.

[0065] It should be noted that all directional indications (such as forward, backward, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0066] The material of the back cover 12 can be the same as that of the front cover 11. Of course, the material of the back cover 12 can also be different from that of the front cover 11. In order to achieve the lightweight design of the earphone 100, the material of the back cover 12 can be hard plastic.

[0067] Please continue reading. Figure 2 The rear shell 12 may include a cover 121 and a rod 122. The cover 121 may be connected to the front shell 11, and the rod 122 may be disposed on the side of the cover 121 away from the front shell 11. A second receiving cavity 102 may be formed inside the cover 121, and the side of the second receiving cavity 102 adjacent to the front shell 11 is open, so that the second receiving cavity 102 can communicate with the first receiving cavity 101, and the second receiving cavity 102 and the first receiving cavity 101 can together form the receiving space 10 of the outer shell 1.

[0068] The cover 121 and the rod 122 can be an integral structure, meaning they form a single unit. This simplifies the manufacturing process of the back cover 12 and improves the connection strength between the cover 121 and the rod 122. However, this application is not limited to this; the cover 121 and the rod 122 can also be separate structures, connected by adhesive, snap-fit, screws, or welding. The rod 122 can be provided with charging contacts 1221 to allow external power to charge the earphone 100.

[0069] Please continue reading. Figure 2 The motherboard 2, battery 3 and speaker module 4 are housed within the accommodating space 10.

[0070] The motherboard 2 integrates a main control chip, a Bluetooth chip, etc., and can be used for charging management, signal transmission, etc. Specifically, the motherboard 2 can be installed in the second receiving cavity 102. A space communicating with the second receiving cavity 102 can be formed inside the rod body 122. A corresponding charging line can be set in this space, and the charging line electrically connects the charging contact 1221 to the motherboard 2 inside the second receiving cavity 102.

[0071] Motherboard 2 can be a rigid circuit board, a flexible circuit board, or a rigid-flex circuit board. Motherboard 2 can use FR-4 dielectric substrates, Rogers dielectric substrates, or a hybrid of FR-4 and Rogers dielectric substrates, etc. Here, FR-4 is a designation for a flame-retardant material grade, and Rogers dielectric substrates are a type of high-frequency board.

[0072] Battery 3 is used to provide power to electronic components such as motherboard 2 and speaker module 4 inside the earphone 100. Battery 3 can be located on the side of motherboard 2 near the first receiving cavity 101.

[0073] The speaker module 4 can be installed within the accommodating space 10, located on the side of the battery 3 near the sound outlet 110. Specifically, the speaker module 4 can be installed within the first accommodating cavity 101. The assembly method between the speaker module 4 and the housing 1 includes, but is not limited to, snap-fit, threaded connection, or adhesive bonding. The speaker module 4 is electrically connected to the mainboard 2 to obtain audio electrical signals such as music and voice, and the speaker module 4 can convert the audio electrical signals into sound signals, supporting external audio playback.

[0074] It is understood that, in addition to housing the motherboard 2, battery 3, and speaker module 4, the accommodating space 10 can also be used to install functional devices such as antennas, communication units, and sensors to enable wireless connection between the earphone 100 and other electronic devices. It is also understood that, in some other embodiments, the battery 3, motherboard 2, antenna, communication unit, and sensors may also be housed within the space of the rod 122; this application does not limit this.

[0075] Please see Figure 3 , Figure 3 for Figure 1The diagram shows a cross-sectional view of the speaker module 4 inside the earphone 100. In this embodiment, the speaker module 4 includes a housing 41 and a core 42. The housing 41 can be separate from the outer shell 1 of the earphone 100, or it can be part of the same housing as the outer shell 1 of the earphone 100; no specific limitation is made here. The core 42 is disposed inside the housing 41 and divides the internal space of the housing 41 into a front cavity 411 and a rear cavity 412. The housing 41 is provided with a sound outlet channel 41a. This sound outlet channel 41a communicates with the front cavity 411. When the core 42 is working, it can drive the air in the front cavity 411 to vibrate. The vibrating air in the front cavity 411 is discharged through the sound outlet channel 41a, which can form sound. The sound outlet channel 41a communicates with the front cavity 411. Figure 1 The sound outlet 110 on the earphone 100 is connected, thereby further exporting the sound to the outside of the earphone 100 so that it can be heard by the user.

[0076] Please see Figure 4 , Figure 4 for Figure 3 The diagram shows a cross-sectional view of the core 42 of the speaker module 4. The core 42 includes a diaphragm 420a, a voice coil 420b fixedly connected to the diaphragm 420a, a magnetic circuit system 420c disposed on one side of the diaphragm 420a, and a frame 420d for mounting the diaphragm 420a and the magnetic circuit system 420c. When this core 42 is applied... Figure 3 When the speaker module 4 is shown, the core 42 is fixed to the inner wall of the housing 41 by the frame 420d. The diaphragm 420a divides the housing 41 into a front cavity 411 and a rear cavity 412. The voice coil 420b, the magnetic circuit system 420c, and the frame 420d are located in the rear cavity 412. The diaphragm 420a and the inner wall of the housing 41 form the front cavity 411 of the speaker module 4. When energized, the voice coil 420b generates an induced magnetic field and is displaced by the magnetic force of the magnetic circuit system 420c, driving the diaphragm 420a to vibrate. This vibrates the air in the front cavity 411 to form sound waves, which are output through the sound outlet channel 41a.

[0077] In this embodiment, the core 42 is a moving-coil loudspeaker, which is inexpensive, technologically mature, and performs well. However, moving-coil loudspeakers have a large vibrating mass and poor transient characteristics. The asymmetrical distribution of mass distribution, diaphragm compliance, and BL electromagnetic driving force will produce varying degrees of rocking vibration and segmented vibration at different frequencies, resulting in severe peaks and valleys in the high-frequency response and low high-frequency extension.

[0078] To address the technical issue of low high-frequency extension in moving-coil loudspeakers, please refer to [link / reference needed]. Figure 5 , Figure 5This is a cross-sectional view of a portion of the structure of an earphone 100 provided in some other embodiments of this application. In this embodiment, the speaker module 4 includes a first speaker unit 4a and a second speaker unit 4b, which are spaced apart within the housing 1 along the sound output direction of the earphone 100. Figure 5 The direction indicated by the middle arrow is the sound output direction of the earphone 100. The sound signals generated by the first speaker unit 4a and the second speaker unit 4b are both output outwards through the sound outlet 110 on the housing 1. The first speaker unit 4a and the second speaker unit 4b have different sound frequencies. Specifically, the first speaker unit 4a can be a woofer, and the second speaker unit 4b can be a tweeter. For example, the first speaker unit 4a can be a moving-coil speaker, and the second speaker unit 4b can be a balanced armature speaker, a planar voice coil 420b speaker, etc.

[0079] In this embodiment, by providing a speaker module 4 including a first speaker unit 4a and a second speaker unit 4b within the earphone 100, the difference in the sound emission frequencies of the first speaker unit 4a and the second speaker unit 4b can be utilized to enable the earphone 100 to have good sound performance in different frequency ranges, thereby improving the sound output effect of the speaker module 4. However, the speaker module 4 in this embodiment occupies a large space, which is not conducive to its assembly within the space-constrained earphone 100.

[0080] To resolve the above technical issues, please refer to [link / reference]. Figures 6a-6b , Figure 6a This is a three-dimensional structural diagram of the speaker module 4 provided in some embodiments of this application. Figure 6b for Figure 6a The exploded view of speaker module 4 shown is illustrated. It is understandable that... Figures 6a-6b The accompanying drawings below only schematically illustrate some of the components included in the speaker module 4. The actual shape, size, location, and construction of these components are not subject to change. Figures 6a-6b As well as the limitations of the accompanying figures below.

[0081] Specifically, the speaker module 4 includes a first speaker unit 4a and a second speaker unit 4b. In this embodiment, the first speaker unit 4a and the second speaker unit 4b have different sound emission frequencies. Specifically, the first speaker unit 4a can be a woofer, and the second speaker unit 4b can be a tweeter. For example, the first speaker unit 4a can be a moving-coil speaker, and the second speaker unit 4b can be a balanced armature speaker, a planar voice coil speaker, etc. In this way, the speaker module 4 can have good performance in both the low-frequency and high-frequency ranges, which is beneficial to improving the sound quality of the speaker module 4.

[0082] Please see Figures 6c-6d , Figure 6c for Figure 6a The top view of speaker module 4 shown. Figure 6d For along Figure 6c A cross-sectional view along line AA. The first loudspeaker unit 4a includes a first frame 43, a first diaphragm assembly 44, a first voice coil 45, and a first magnetic circuit system 46. The first diaphragm assembly 44 is supported on the first frame 43, the first voice coil 45 is fixed on the first diaphragm assembly 44, and the first magnetic circuit system 46 is fixed on the first frame 43. The first voice coil 45 and the first magnetic circuit system 46 cooperate to drive the first diaphragm assembly 44 to vibrate.

[0083] Please see Figure 6e , Figure 6e for Figure 6a The diagram shows the assembly of the speaker module 4 with the housing 1 of the earphone 100. When the first speaker unit 4a is applied inside the earphone 100, the first speaker unit 4a can divide the space inside the earphone 100 into a first front cavity C1 and a first rear cavity C2 by means of the first diaphragm assembly 44. The first front cavity C1 is located on the side of the first diaphragm assembly 44 facing away from the first magnetic circuit system 46, and the first rear cavity C2 is located on the side of the first diaphragm assembly 44 facing the first magnetic circuit system 46. In this embodiment, please refer to... Figure 6e The first rear cavity C2 is located on the side of the first front cavity C1 near the sound outlet 110110. In some embodiments, the first frame 43, the first diaphragm assembly 44, the first voice coil 45 and the first magnetic circuit system 46 share a common central axis.

[0084] The second speaker unit 4b is located on the side of the first magnetic circuit system 46 away from the central axis of the first speaker unit 4a. Specifically, the second speaker unit 4b is located outside the first frame 43 and on the outer periphery of the first magnetic circuit system 46. For example, the second speaker unit 4b can be fixed to the surface of the first frame 43 facing away from the first diaphragm assembly 44. There can be one or more second speaker units 4b. When there are multiple second speaker units 4b, the multiple second speakers 4b can be arranged circumferentially around the first magnetic circuit system 46. For example, in... Figure 6a In one embodiment, there are two second speaker units 4b, which are symmetrically arranged on both sides of the first magnetic circuit system 4b.

[0085] A plane perpendicular to the central axis of the first diaphragm assembly 44 is defined as the reference plane S. The orthographic projection of the second speaker unit 4b onto the reference plane S is the first projection S1, and the orthographic projection of the first speaker frame 43 onto the reference plane S is the second projection S2. The first projection S1 and the second projection S2 overlap. That is, at least a portion of the first projection S1 overlaps with the second projection S2.

[0086] For example, please refer to Figure 7a , Figure 7a This is a schematic diagram illustrating the structure of a first projection S1 and a second projection S2 provided in some embodiments of this application. In this embodiment, a portion of the first projection S1 overlaps with the second projection S2. Specifically, a portion of the first projection S1 is located within the outer contour of the second projection S2, and another portion of the first projection S1 is located outside the outer contour of the second projection S2.

[0087] In this way, by placing the second speaker unit 4b on the outer periphery of the first magnetic circuit system 46, that is, arranging the second speaker unit 4b and the first magnetic circuit system 46 in a plane perpendicular to the central axis O of the first speaker unit 4a, and making the first projection S1 and the second projection S2 overlap, the space around the first magnetic circuit system 46 can be cleverly utilized. This allows for the integration of multiple speaker units into one unit while reducing the circumferential dimensions of the speaker module 4, thereby reducing the volume of the speaker module 4 and facilitating its assembly within the space-constrained headphone 100. Furthermore, by placing the second speaker unit 4b on the outer periphery of the first magnetic circuit system 46, interference between the second speaker unit 4b and the first diaphragm assembly 44 can be avoided. This reduces the overall volume of the speaker module 4 while ensuring the effective vibration area of ​​the first diaphragm assembly 44 of the first speaker unit 4a, improving the sound output performance of the first speaker unit 4a.

[0088] It should be noted that the "circumferential dimension of the speaker module 4" mentioned in this article refers to the dimension of the speaker module 4 in a plane perpendicular to the central axis O of the first speaker unit 4a. The "effective vibrating area of ​​the first diaphragm assembly 44" mentioned in this article refers to the area of ​​the portion of the first diaphragm assembly 44 capable of propelling air movement. The effective vibrating area of ​​the first diaphragm assembly 44 is related to the vibration frequency; the smaller the effective vibrating area of ​​the first diaphragm assembly 44, the higher the vibration frequency. Conversely, the larger the effective vibrating area of ​​the first diaphragm assembly 44, the lower the vibration frequency.

[0089] In other embodiments, please refer to Figure 7b , Figure 7bThis is a schematic diagram of the structure of the first projection S1 and the second projection S2 provided in some other embodiments of this application. In this embodiment, the first projection S1 overlaps entirely with the second projection S2. Specifically, the first projection S1 is located within the outer contour of the second projection S2. That is, the first projection S1 is contained within the second projection S2. In this embodiment, since the first projection S1 is contained within the second projection S2, the circumferential dimension of the speaker module 4 is the same as the circumferential dimension of the first speaker unit 4a. In this way, the circumferential dimension of the speaker module 4 can be further reduced, thereby enabling the second speaker unit 4b and the first speaker unit 4a to be integrated into one unit without increasing the circumferential dimension of the speaker module 4, realizing the sound output of multiple speaker units and improving the sound effect of the speaker module 4.

[0090] In some embodiments, please refer to Figure 6d The reference plane S is located on the side of the first diaphragm assembly 44 opposite to the first magnetic circuit system 46. The maximum distance between the end face of the second speaker unit 4b away from the reference plane S and the reference plane S is a first distance d1, and the maximum distance between the end face of the first magnetic circuit system 46 away from the reference plane S and the reference plane S is a second distance d2. The first distance d1 is less than or equal to the second distance d2. That is, the end face of the second speaker unit 4b away from the reference plane S does not extend beyond the end face of the first magnetic circuit system 46 away from the reference plane S. In this way, the axial dimension of the speaker module 4 can be reduced, making the axial dimension of the speaker module 4 equal to the axial dimension of the first speaker unit 4a. Thus, the second speaker unit 4b and the first speaker unit 4a can be integrated into one unit without increasing the axial dimension of the speaker module 4, realizing the sound output of multiple speaker units and improving the sound effect of the speaker module 4.

[0091] Among them, "axial dimension of speaker module 4" refers to the dimension of speaker module 4 in the direction of extension along the central axis O of the first speaker unit 4a.

[0092] The specific structure of the first speaker unit 4a in some embodiments of this application is described below.

[0093] Please see Figure 8a , Figure 8a for Figure 6b A perspective view of the first speaker unit 4a in the speaker module shown. Figure 8b for Figure 8a An exploded view of the first speaker unit 4a shown in the figure. Figure 8c For along Figure 8a A sectional view along line BB. It is understandable that... Figures 8a-8c The accompanying drawings below only schematically show some components of the first speaker unit 4a. The actual shape, size, position, and construction of these components are not subject to change. Figures 8a-8c As well as the limitations of the accompanying figures below.

[0094] It is understood that the term "top" used in the following description of the various components in the first speaker unit 4a refers to the part of the described component near the first front cavity C1 when the described component is applied inside the earphone, and "bottom" refers to the part of the described component away from the first front cavity C1 when the first speaker unit 4a is applied inside the earphone. The term "inner" used in the following description of the various components in the first speaker unit 4a refers to the part of the described component near the central axis O of the first speaker unit 4a, and "outer" refers to the part of the described component away from the central axis O of the first speaker unit 4a. This is not intended to 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.

[0095] The first speaker frame 43 serves as a "support frame" for the first speaker unit 4a, supporting the first diaphragm assembly 44 and fixing the first magnetic circuit system 46. The material of the first speaker frame 43 is, but is not limited to, metal and plastic.

[0096] Please see Figure 9a , Figure 9a for Figure 8b The diagram shows a perspective view of the first speaker unit 4a's first frame 43. The first frame 43 includes a first bottom wall 431 and a first peripheral wall 432. The first bottom wall 431 is formed as a circular plate structure, and has opposing first wall surfaces 4311 and second wall surfaces 4312. The first wall surface 4311 is the surface facing the first diaphragm assembly 44, and the second wall surface 4312 is the surface facing away from the first diaphragm assembly 44. A through-hole 4313 is formed on the first bottom wall 431, penetrating the first wall surface 4311 and the second wall surface 4312.

[0097] The first basin holder 43 can be connected to the first magnetic circuit system 46 via the inner circumferential surface of the through opening 4313. For example, the inner circumferential surface of the through opening 4313 can be connected to the first magnetic circuit system 46 by means of bonding, welding, etc.

[0098] In some embodiments, the shape of the through-hole 4313 may be adapted to the outer peripheral contour of the first magnetic circuit system 46. Based on this, the entire inner peripheral surface of the through-hole 4313 may be connected to the outer peripheral surface of the first magnetic circuit system 46. Of course, in other embodiments, the shape of the through-hole 4313 may not be adapted to the outer peripheral contour of the first magnetic circuit system 46. In this case, a portion of the inner peripheral surface of the through-hole 4313 may be connected to the outer peripheral surface of the first magnetic circuit system 46, while another portion of the inner peripheral surface of the through-hole 4313 may be spaced apart from the outer peripheral surface of the first magnetic circuit system 46. This defines the first sound outlet 401 of the first speaker unit 4a between the inner peripheral surface of the through-hole 4313 and the outer peripheral surface of the first magnetic circuit system 46. The first sound outlet 401 may face the sound outlet 110 of the earphone 100.

[0099] In some embodiments, please refer to Figure 9a The inner circumferential surface of the through-hole 4313 includes a first inner surface 4313a, a second inner surface 4313b, a third inner surface 4313c, and a fourth inner surface 4313d, which are connected end to end. The first inner surface 4313a and the third inner surface 4313c are both planar. Optionally, the first inner surface 4313a and the third inner surface 4313c are symmetrical about a plane passing through the central axis O of the first speaker unit 4a and parallel to the first inner surface 4313a. In some embodiments, the first inner surface 4313a and the third inner surface 4313c are parallel to each other. The second inner surface 4313b and the fourth inner surface 4313d are formed as arcuate surfaces arched in a direction away from the central axis O of the first speaker unit 4a, and the second inner surface 4313b and the fourth inner surface 4313d are symmetrical about a plane passing through the central axis of the first speaker unit 4a and perpendicular to the first inner surface 4313a.

[0100] Please see Figures 9a-9b , Figure 9b for Figure 9a The image shows a perspective view of the first speaker unit 43 from another angle. A limiting groove 4312a is provided on the second wall surface 4312, recessed towards the first wall surface 4311. The limiting groove 4312a can be located outside the inner circumferential surface of the through opening 4313. The second speaker unit 4b can be fixed to the bottom wall of the limiting groove 4312a. In this way, the second speaker unit 4b can be limited by the limiting groove 4312a, and the space occupied by the second speaker unit 4b in the axial direction of the speaker module 4 can be reduced, which is beneficial for reducing the axial dimension of the speaker module 4.

[0101] The number of limiting slots 4312a can be the same as the number of second speaker units 4b. See also: [link to embodiments]. Figure 9bThere are two limiting grooves 4312a. The two limiting grooves 4312a are symmetrically arranged on the first bottom wall 431, and the two limiting grooves 4312a are located on the outer side of the first inner surface 4313a and the third inner surface 4313c, respectively. Since the first inner surface 4313a and the second inner surface 4313b are both formed as planes, setting the two limiting grooves 4312a on the outer side of the first inner surface 4313a and the third inner surface 4313c respectively helps to increase the radial dimension of the limiting grooves 4312a in the first bottom wall 431, thereby facilitating the fixing of the second speaker unit 4b in the limiting grooves 4312a.

[0102] Based on this, in order to further increase the size of the limiting groove 4312a in the radial direction of the first bottom wall 431, the two ends of the limiting groove 4312a in the radial direction of the first bottom wall 431 respectively penetrate the inner peripheral surface of the through opening 4313 and the outer edge of the first bottom wall 431.

[0103] The first peripheral wall 432 is disposed around the outer edge of the first bottom wall 431. See 9a and... Figure 9c , Figure 9c For along Figure 9a A cross-sectional view along line CC. The first peripheral wall 432 is annular, and its inner wall surface is connected to the outer edge of the first bottom wall 431. In the direction extending along the central axis O of the first loudspeaker unit 4a, the first peripheral wall 432 has opposing first end face 4321 and second end face 4322. The first end face 4321 extends beyond the second wall face 4311 in a direction away from the second wall face 4312, and the first diaphragm assembly 44 is supported on the first end face 4321. The second end face 4322 may be flush with the second wall face 4312 of the first bottom wall 431. It is understood that in other embodiments, the second end face 4322 may also extend beyond the second wall face 4312 in a direction away from the first wall face 4311.

[0104] Please see Figure 9a and Figure 9c A first fixing ear 4323 is provided on the outer wall surface of the first peripheral wall 432, and the first fixing ear 4323 protrudes outward from the outer wall surface of the first peripheral wall 432. The surface of the first fixing ear 4323 facing the first diaphragm assembly 44 is flush with the first end face 4321 of the first peripheral wall 432. There can be multiple first fixing ears 4323, and the multiple first fixing ears 4323 are spaced apart in the circumferential direction of the first peripheral wall 432. Herein, "multiple" in this application means two or more. For example, in Figure 9a In the embodiment shown, there are two first fixed ears 4323. The first speaker unit 4a can be fixed to the outer wall of the earphone 100 by means of the outer wall surface of the first peripheral wall 432 and the first fixed ears 4323.

[0105] The first basin frame 43 can be a single structural component or assembled from multiple parts through methods such as bonding, snap-fitting, or threaded connection. It is understood that the first basin frame 43 is used to support the first diaphragm assembly 44 and fix the first magnetic circuit system 46. While meeting this requirement, the first basin frame 43 can also have other design shapes, and is not limited to this embodiment.

[0106] The first magnetic circuit system 46 is used to cooperate with the first voice coil 45 to drive the first diaphragm assembly 44 to vibrate. (See also...) Figure 10a , Figure 10a for Figure 8b The diagram shows a perspective view of the first magnetic circuit system 46 in the first speaker unit 4a. The first magnetic circuit system 46 can be fixed at the through-hole 4313 of the first frame 43.

[0107] Please see Figure 10a The first magnetic circuit system 46 includes a first profile surface 46a. The second speaker unit 4b can be disposed on the outer periphery of the first profile surface 46a. In some embodiments, the first profile surface 46a is formed as a plane. Specifically, the first profile surface 46a can be parallel to the central axis of the first diaphragm assembly 44. In this way, the planar first profile surface 46a can be used to avoid obstructing the second speaker unit 4b, providing mounting space for the arrangement of the second speaker unit 4b.

[0108] Based on this, please refer to Figure 10b , Figure 10b For along Figure 6a A cross-sectional view along line DD. The second speaker unit 4b includes a second contour surface 4b0, which is adapted to the first contour surface 46a. That is, the shape of the second contour surface 4b0 is the same as the shape of the first contour surface 46a. Exemplarily, both the second contour surface 4b0 and the first contour surface 46a are formed as planes. It is understood that in other embodiments, the second contour surface 4b0 and the first contour surface 46a may also be formed as other shapes. For example, the second contour surface 4b0 and the first contour surface 46a may be formed as arc surfaces that arch towards the central axis of the first speaker unit 4a. In this way, by adapting the second contour surface 4b0 to the first contour surface 46a, it is easier for the second contour surface 4b0 and the first contour surface 46a to fit together, making the structure of the speaker module 4 more compact and facilitating a larger overall volume of the second speaker unit 4b.

[0109] Please continue reading. Figure 10aIn this embodiment, the first magnetic circuit system 46 includes two first contour surfaces 46a, which define a first opening and a second opening in the circumferential direction of the first magnetic circuit system 46. The first magnetic circuit system 46 also includes a third contour surface 46b disposed at the first opening and a fourth contour surface 46c disposed at the second opening. The two first contour surfaces 46a, the third contour surface 46b, and the fourth contour surface 46c form the outer contour surface of the first magnetic circuit system 46.

[0110] In some embodiments, please refer to Figures 10a-10b Two first contour surfaces 46a are symmetrically arranged on both sides of the first magnetic circuit system 46. Specifically, the two first contour surfaces 46a are symmetrically arranged on both sides of the central axis O of the first speaker unit 4a. A third contour surface 46b and a fourth contour surface 46c are symmetrically arranged on both sides of the central axis O of the first speaker unit 4a. Specifically, the two first contour surfaces 46a can be symmetrical about a plane passing through the central axis O of the first speaker unit 4a and parallel to the first inner surface 4313a. The third contour surface 46b and the fourth contour surface 46c can be symmetrical about a plane passing through the central axis of the first speaker unit 4a and perpendicular to the first inner surface 4313a. This makes the structure of the first magnetic circuit system 46 simple and symmetrical, which helps to improve the uniformity of the driving force provided by the first magnetic circuit system 46 to the first diaphragm assembly 44, thereby avoiding, to some extent, the problem of polarization or rolling vibration of the first diaphragm assembly 44 caused by uneven force on the first diaphragm assembly 44.

[0111] For further details, please refer to Figure 10a The two first contour surfaces 46a are parallel to each other. This further improves the structural symmetry of the first magnetic circuit system 46 and provides more installation space for the second speaker unit 4b, thus facilitating its placement.

[0112] In some embodiments, please refer to Figures 10a-10b The third contour surface 46b and the fourth contour surface 46c can be formed as arc surfaces that arch away from the central axis of the first diaphragm assembly 44. In this way, the overall volume of the first magnetic circuit system 46 can be increased, which is beneficial to increasing the driving strength of the first magnetic circuit system 46 on the first diaphragm assembly 44, thereby providing the sound output effect of the first speaker unit 4a.

[0113] It is understood that in other embodiments, the third contour surface 46b and the fourth contour surface 46c may also be formed as planes. Based on this, the outer peripheral surface of the first magnetic circuit system 46 may be formed as a rectangle.

[0114] In this embodiment, a second speaker unit 4b can be respectively provided on the outer periphery of the two first contour surfaces 46a, and the two second speaker units 4b and one first speaker unit 4a can be integrated into one unit to realize the sound output of multiple speaker units and improve the sound output effect of the speaker module 4.

[0115] It is understood that in other embodiments, a second speaker unit 4b may also be provided on the outer periphery of one of the two first contour surfaces 46a. In this way, a second speaker unit 4b can be integrated with a first speaker unit 4a to achieve multi-speaker unit sound output and improve the sound output effect of the speaker module 4.

[0116] Please see Figure 10c , Figure 10c for Figure 10a The diagram shows an exploded view of the first magnetic circuit system 46. The first magnetic circuit system 46 includes a magnetic cup 461, a central magnet 462, a magnetic yoke 463, and an auxiliary magnet 464. It is understood that in other embodiments, the first magnetic circuit system 46 may not include the auxiliary magnet 464.

[0117] The magnetic bowl 461 can be used to integrate the various components of the first magnetic circuit system 46 into one unit, thereby enabling the overall assembly of the first magnetic circuit system 46, which helps to reduce assembly difficulty and improve assembly efficiency. The magnetic bowl 461 includes a base plate 4611 and a side plate 4612, with the side plate 4612 arranged around the outer edge of the base plate 4611. The outer peripheral surface of the side plate 4612 forms the outer contour surface of the first magnetic circuit system 46. The outer peripheral surface of the side plate 4612 is fixedly connected to the inner peripheral surface of the through opening 4313. The end face of the side plate 4612 away from the base plate 4611 is flush with the first wall surface of the first bottom wall 431. The side plate 4612 and the base plate 4611 can be an integral structure or a separate structure.

[0118] In some embodiments, the side panel 4612 and the first bottom wall 431 are an integral structure, which simplifies the structure of the first speaker unit 4a and improves the connection strength between the first bottom wall 431 and the side panel 4612. In other embodiments, the side panel 4612 and the first bottom wall 431 may also be separate structures. The side panel 4612 can be fixed to the first bottom wall 431 by means of adhesive bonding, welding, or other methods.

[0119] The magnetic bowl 461 can be made of a magnetically conductive material. For example, the magnetic bowl 461 can be a yoke made of stacked silicon steel sheets or stacked pure iron sheets. The central magnet 462 is a magnet or a magnetic steel. In this way, both the side plate 4612 and the bottom plate 4611 of the magnetic bowl 461 can constrain the magnetic lines of force of the central magnet 462, which can increase the magnetic flux intensity in the magnetic gap 465 and improve the driving strength of the first diaphragm assembly 44.

[0120] Please see Figure 10a and combined Figure 10c The central magnet 462 is fixed to the base plate 4611 of the magnetic cup 461, and a magnetic gap 465 is defined between the central magnet 462 and the side plate 4612. The end of the first voice coil 45 away from the first diaphragm assembly 44 extends into the magnetic gap 465. Thus, by defining the magnetic gap 465 between the central magnet 462 and the side plate 4612, the structure of the first magnetic circuit system 46 can be simplified and the space occupied by the first magnetic circuit system 46 can be reduced.

[0121] It is understood that in other embodiments, when the first voice coil 45 is a planar voice coil, the first voice coil 45 may not extend into the magnetic gap 465.

[0122] Please see Figures 10a-10b The extension path of the magnetic gap 465 is the same as the extension path of the outer periphery of the first magnetic circuit system 46. Specifically, the shape of the outer periphery of the central magnet 462 and the shape of the inner periphery of the side plate 4612 are the same as the outer periphery of the first magnetic circuit system 46. In this way, the space inside the magnetic cup 461 can be fully utilized, making the structure of the first magnetic circuit system 46 more compact. This is beneficial for increasing the volume of the central magnet 462, improving the driving strength of the first diaphragm assembly 44, and thus improving the sound output performance of the speaker module 4.

[0123] For details, please refer to Figures 10b-10c The central magnet 462 includes a first outer peripheral surface 462a, a second outer peripheral surface 462b, a third outer peripheral surface 462c, and a fourth outer peripheral surface 462d, which are connected end to end. The first outer peripheral surface 462a and the third outer peripheral surface 462c are opposite each other, and the shapes of the first outer peripheral surface 462a and the third outer peripheral surface 462c are the same as the shape of the first contour surface 46a. The second outer peripheral surface 462b and the fourth outer peripheral surface 462d are opposite each other. The shape of the second outer peripheral surface 462b is the same as the shape of the third contour surface 46b, and the shape of the fourth outer peripheral surface 462d is the same as the shape of the fourth contour surface 46c.

[0124] Specifically, the first outer peripheral surface 462a and the third outer peripheral surface 462c are both planar, and are symmetrically arranged on both sides of the central axis of the first diaphragm assembly 44. The second outer peripheral surface 462b and the fourth outer peripheral surface 462d are both arc-shaped surfaces that arch away from the central axis of the first diaphragm assembly 44, and are symmetrically arranged on both sides of the central axis of the first diaphragm assembly 44. In this way, a first gap 465a can be defined between the first outer peripheral surface 462a and the side plate 4612, a second gap 465b can be defined between the second outer peripheral surface 462b and the side plate 4612, a third gap 465c can be defined between the third outer peripheral surface 462c and the side plate 4612, and a fourth gap 465d can be defined between the fourth outer peripheral surface 462d and the side plate 4612. The extension path of the first gap 465a can be the same as the extension path of the first outer peripheral surface 462a and the first contour surface 46a, the extension path of the second gap 465b can be the same as the extension path of the second outer peripheral surface 462b and the third contour surface 46b, the extension path of the third gap 465c can be the same as the extension path of the third outer peripheral surface 462c and the first contour surface 46a, and the extension path of the fourth gap 465d can be the same as the extension path of the fourth outer peripheral surface 462d and the fourth contour surface 46c. Specifically, the first gap portion 465a and the third gap portion 465c extend in a straight line in the circumferential direction of the first magnetic circuit system 46, while the second gap portion 465b and the fourth gap portion 465d extend in an arc in the circumferential direction of the first magnetic circuit system 46. The structure is simple and easy to manufacture.

[0125] The magnetic yoke 463 can be mounted on the surface of the central magnet 462 away from the base plate 4611 by means of adhesive bonding, snap-fit, or threaded connection. In this way, by constraining the magnetic lines of force with the magnetic yoke 463, the magnetic flux intensity within the aforementioned magnetic gap 465 can be increased, thereby enhancing the driving strength of the first diaphragm assembly 44. The shape of the outer periphery of the magnetic yoke 463 is the same as the shape of the outer periphery of the central magnet 462.

[0126] Building upon this, to further increase the magnetic flux intensity within the magnetic gap 465, an auxiliary magnet 464 can be provided on the surface of the magnetic yoke 463 facing away from the central magnet 462. The auxiliary magnet 464 is a magnet or a magnetic steel. The auxiliary magnet 464 can be attached to the surface of the magnetic yoke 463 by means of adhesive bonding, snap-fitting, threaded connection, etc. The shape of the outer periphery of the auxiliary magnet 464 is the same as the shape of the outer periphery of the central magnet 462.

[0127] In this configuration, the magnetic pole of the auxiliary magnet 464 at the end closest to the central magnet 462 is the same as the magnetic pole of the central magnet 462 at the end closest to the auxiliary magnet 464. The magnetic pole of the auxiliary magnet 464 at the end furthest from the central magnet 462 is opposite to the magnetic pole of the central magnet 462 at the end closest to the auxiliary magnet 464. For an example, please refer to [link to example]. Figure 10d , Figure 10d For along Figure 10a A cross-sectional view of the EE line. The end of the central magnet 462 closest to the auxiliary magnet 464 is the N pole, and the end furthest from the auxiliary magnet 464 is the S pole. Similarly, the end of the auxiliary magnet 464 closest to the central magnet 462 is the N pole, and the end furthest from the central magnet 462 is the S pole. This design causes the magnetic field lines of the auxiliary magnet 464 and the central magnet 462 to mutually inhibit each other, effectively suppressing the outward divergence of the magnetic field lines of the central magnet 462. This effectively increases the magnetic flux density within the magnetic gap 465, increases the magnetic field strength within the magnetic gap 465, and consequently improves the sensitivity and acoustic performance of the first speaker unit 4a.

[0128] Please see Figure 11 , Figure 11 for Figure 10a The first magnetic circuit system 46 shown in the figure and Figure 9a The diagram shows the assembly of the first speaker unit 43. The two first contour surfaces 46a of the first magnetic circuit system 46 are connected to the first inner surface 4313a and the third inner surface 4313c of the through-port 4313, respectively. The third contour surface 46b of the first magnetic circuit system 46 is spaced apart from the third inner surface 4313c of the through-port 4313, and the fourth contour surface 46c of the first magnetic circuit system 46 is spaced apart from the fourth inner surface 4313d of the through-port 4313. Thus, first sound outlets 401 can be defined between the third contour surface 46b and the third inner surface 4313c, and between the fourth contour surface 46c and the fourth inner surface 4313d, respectively. The sound emitted by the first speaker unit 4a can be transmitted to the sound outlet 110 of the headphone 100 through the first sound outlets 401.

[0129] In this embodiment, the shape of the third contour surface 46b is the same as the shape of the third inner surface 4313c, and the shape of the fourth contour surface 46c is the same as the shape of the fourth inner surface 4313d. This increases the area of ​​the first sound outlet 401 and improves the sound output effect.

[0130] It is understood that in other embodiments, the first sound outlet 401 may also be formed on the first bottom wall 431 and spaced apart from the through opening 4313.

[0131] Please see Figure 12 , Figure 12 for Figure 8bThe image shows a perspective view of the first voice coil 45 in the first loudspeaker unit 4a. The first voice coil 45 is used to cooperate with the first magnetic circuit system 46 to drive the first diaphragm assembly 44 to vibrate, thereby pushing the air in the first front cavity C1 of the first loudspeaker unit 4a to generate sound.

[0132] The first voice coil 45 is formed as a ring. The first voice coil 45 has a top surface 45a and a bottom surface 45b. The top surface 45a is used to connect with the first diaphragm assembly 44, and the end of the first voice coil 45 where the bottom surface 45b is located is used to extend into the first magnetic circuit system 46 to cooperate with the first magnetic circuit system 46.

[0133] For details, please refer to Figure 12 The first voice coil 45 comprises a first segment 451, a second segment 452, a third segment 453, and a fourth segment 454 connected end-to-end. The first voice coil 45 is an axially symmetric figure. The first segment 451 is symmetrical with the third segment 453, and the second segment 452 is symmetrical with the fourth segment 454. Specifically, the first segment 451 is adapted to the first gap 465a, the second segment 452 is adapted to the second gap 465b, the third segment 453 is adapted to the third gap 465c, and the fourth segment 454 is adapted to the fourth gap 465d. That is, in the circumferential direction of the first magnetic circuit system 46, the extension path of the first segment 451 is the same as the extension path of the first gap 465a, the extension path of the second segment 452 is the same as the extension path of the second gap 465b, the extension path of the third segment 453 is the same as the extension path of the third gap 465c, and the extension path of the fourth segment 454 is the same as the extension path of the fourth gap 465d.

[0134] In some embodiments, the first segment 451 and the third segment 453 are both formed as flat plates. Optionally, the first segment 451 and the third segment 453 are parallel to each other. The second segment 452 and the fourth segment 454 are formed as arcuate plates that arch towards the direction away from the central axis of the first speaker unit 4a.

[0135] Please see Figure 13 , Figure 13 for Figure 12 The first voice coil 45 shown is Figure 10a The diagram shows the engagement of the first magnetic circuit system 46. Specifically, a portion of the first segment 451 extends into the first gap 465a, a portion of the second segment 452 extends into the second gap 465b, a portion of the third segment 453 extends into the third gap 465c, and a portion of the fourth segment 454 extends into the fourth gap 465d.

[0136] In this way, by adapting the first segment 451 of the first voice coil 45 to the first gap 465a, the second segment 452 of the first voice coil 45 to the second gap 465b, the third segment 453 of the first voice coil 45 to the third gap 465c, and the fourth segment 454 of the first voice coil 45 to the fourth gap 465d, the entire magnetic gap 465 can be adapted to the first voice coil 45. This helps ensure the reliability of the fit between the first voice coil 45 and the first magnetic circuit system 46. As a result, when the first voice coil 45 and the first magnetic circuit system 46 cooperate to drive the first diaphragm assembly 44 to vibrate, it can help ensure the uniformity of the driving force of the first diaphragm assembly 44 in the circumferential direction of the first frame 43, and at least to a certain extent avoid the problem of rolling vibration of the first diaphragm assembly 44.

[0137] Please see Figures 14a-14c , Figure 14a for Figure 8b A schematic diagram of one structure of the first diaphragm assembly 44 in the first loudspeaker unit 4a shown. Figure 14b for Figure 14a The first diaphragm assembly 44 shown is... Figure 12 The diagram shows the assembly structure of the first voice coil 45. Figure 14c for Figure 14b A magnified view of region M in the middle. Please refer to [link / reference]. Figure 14a The first diaphragm assembly 44 includes a first dome 441 and a first diaphragm 442.

[0138] Please see Figure 14a and combined Figure 14b The first dome 441 includes a first fixing portion 4411, a flat portion 4412, and a protrusion 4413 connected in sequence. The protrusion 4413 is located inside the flat portion 4412, and the first fixing portion 4411 is located outside the protrusion 4413. The protrusion 4413 protrudes in a direction away from the first magnetic circuit system 46. The flat portion 4412 is arranged around the outer edge of the protrusion 4413. The flat portion 4412 is formed into a flat plate structure. The flat portion 4412 includes a first top surface 4412a and a first bottom surface 4412b arranged opposite to each other. The outer edge of the flat portion 4412 has a circular outline shape, and the flat portion 4412 is used to fix the first voice coil 45. For details, please refer to [link to relevant documentation]. Figure 14b The first voice coil 45 can be fixed on the first bottom surface 4412b of the flat portion 4412. In this way, by providing the flat portion 4412 on the first dome 441, it is easier to assemble the first voice coil 45 onto the first dome 441, which helps to reduce the assembly difficulty of the first voice coil 45.

[0139] For further information, please refer to [link / reference]. Figure 14bThe first voice coil 45 can surround the outer periphery of the protrusion 4413, and the outer contour of the orthographic projection of the protrusion 4413 onto the plane of the flat portion 4412 is the same as the shape of the first voice coil 45. This increases the area of ​​the protrusion 4413, increases the vibration amplitude of the first diaphragm assembly 44, and thus improves the sound output of the first speaker unit 4a. Simultaneously, by setting the outer contour of the orthographic projection of the protrusion 4413 onto the plane of the flat portion 4412 to be the same as the shape of the first voice coil 45, the uniformity of force on the first diaphragm assembly 44 can be improved when the first voice coil 45 drives the first diaphragm assembly 44 to vibrate, thereby to some extent avoiding the problem of polarization or rolling vibration of the first diaphragm assembly 44 caused by uneven force distribution.

[0140] Please see Figures 14a-14b The first fixing part 4411 is formed in an annular shape and is disposed around the outer edge of the flat part 4412. See also... Figure 14c In the direction from the first bottom surface 4412b to the first top surface 4412a, the first fixing part 4411 extends toward the direction away from the central axis of the first diaphragm assembly 44.

[0141] Please see Figures 14a-14c The first diaphragm 442 is annular. The first diaphragm 442 includes a first connecting portion 4421, a first folded ring 4422, and a second connecting portion 4423 connected in sequence. The first connecting portion 4421 is located inside the first folded ring 4422, and the second connecting portion 4423 is located outside the first folded ring 4422.

[0142] The first connecting portion 4421 is connected to the first fixing portion 4411. Specifically, the first connecting portion 4421 has a second top surface 4421a and a second bottom surface 4421b disposed opposite to each other. The second bottom surface 4421b of the first connecting portion 4421 is connected to the first fixing portion 4411.

[0143] Please see Figure 14c The second connecting portion 4423 has a third top surface 4423a and a third bottom surface 4423b facing away from each other. The third bottom surface 4423b of the second connecting portion 4423 is used to connect with... Figures 9a-9c The first end face 4321 of the first peripheral wall 432 in the first basin stand 43 shown is fixed. Please refer back to the previous section. Figure 8c The third bottom surface 4423b of the second connecting part 4423 faces the first basin stand 43 and is fixed to the first end surface 4321 of the first peripheral wall 432 in the first basin stand 43.

[0144] Please see Figure 14aThe outer edge of the second connecting portion 4423 is provided with an outwardly protruding second fixing ear 4423d, which is used to connect with the first fixing ear 4323. The shape and number of the second fixing ear 4423d are the same as those of the first fixing ear 4323. In this way, the contact area between the first diaphragm assembly 44 and the first frame 43 can be increased, thereby improving the connection strength between the first diaphragm assembly 44 and the first frame 43.

[0145] Please see Figure 14a and Figure 14b The first fold ring 4422 has an arc-shaped or nearly arc-shaped cross-section, and its extension trajectory is circular. The first fold ring 4422 of the first diaphragm 442 is convex, meaning it protrudes away from the first magnetic circuit system 46. This allows the first fold ring 4422 to deform under external force, enabling the first dome 441 to reciprocate relative to the second connecting portion 4423 in the direction extending along the central axis of the first diaphragm assembly 44. It is understood that in other embodiments, the first fold ring 4422 of the first diaphragm 442 may also be concave, meaning it is concave towards the first magnetic circuit system 46.

[0146] Please see Figures 15a-15b , Figure 15a for Figure 6a A perspective view of the second speaker unit 4b shown in the figure. Figure 15b for Figure 15a The diagram shows a cross-sectional view of the second speaker unit 4b. In this embodiment, the second speaker unit 4b can be a moving iron tweeter. It is understood that in other embodiments, the second speaker unit 4b can also be a planar voice coil speaker.

[0147] The second speaker unit 4b may include: a protective shell 47, a second diaphragm assembly 48, a reed 4b1, a transmission rod 4b2, a second magnetic circuit system 49, and a second voice coil 4b3. It is understood that... Figure 15a , Figure 15b The accompanying drawings below only schematically illustrate some components of the second speaker unit 4b; the actual shape, size, location, and construction of these components are not subject to change. Figure 15a , Figure 15b As well as the limitations of the accompanying figures below.

[0148] The protective shell 47 serves as a carrier for the various components within the second speaker unit 4b, protecting the second diaphragm assembly 48, reed 4b1, transmission rod 4b2, second magnetic circuit system 49, and second voice coil 4b3, etc.

[0149] The protective shell 47 may be made of materials including, but not limited to, metal, plastic, and a combination of metal and plastic. In some embodiments, the protective shell 47 may be made of plastic, which is low in cost and easy to mold, thus reducing the processing cost of the second speaker unit 4b. In other examples, to reduce magnetic interference between the first magnetic circuit system 46 and the second magnetic circuit system 49, the protective shell 47 may be made of a magnetically conductive material. For example, the protective shell 47 may be made of low-carbon steel or other metals with magnetic shielding properties.

[0150] For details, please refer to Figure 15a and Figure 15b The protective housing 47 can be rectangular in shape. The second speaker unit 4b is fixed to the first speaker unit 4a by means of the protective housing 47. Specifically, the protective housing 47 has a first wall plate 471 and a second wall plate 472 that are axially opposed to each other in the speaker module 4. Please refer to... Figure 16 , Figure 16 for Figure 6a Another perspective view of the speaker module 4 shown. The first wall plate 471 can face the bottom wall of the limiting groove 4312a and is used to fix it to the bottom wall of the limiting groove 4312a. A second sound outlet 402 can be opened on the second wall plate 472. In this way, the sound outlet directions of the first sound outlet 401 and the second sound outlet 402 are aligned, thereby ensuring that the sound paths of the first speaker unit 4a and the second speaker unit 4b are unobstructed while reducing the phase difference of the sound waves output by the first speaker unit 4a and the second speaker unit 4b, thereby improving the sound quality of the speaker module 4.

[0151] Please continue reading. Figure 16 The protective housing 47 also includes a third wall panel 473, which is opposite to the first profile surface 46a of the first magnetic circuit system 46. The third wall panel 473 is flat, and its outer surface forms the second profile surface 4b0 of the second speaker unit 4b.

[0152] The protective shell 47 can be a single structural unit or assembled from multiple parts. See also the following for some embodiments. Figure 15b The protective shell 47 includes a first shell portion 47a and a second shell portion 47b. The protective shell 47 is formed by assembling the first shell portion 47a and the second shell portion 47b. This facilitates the separate processing of the first shell portion 47a and the second shell portion 47b, simplifies the mold structure of the first shell portion 47a and the second shell portion 47b, reduces the molding difficulty of the first shell portion 47a and the second shell portion 47b, and thus reduces the processing and manufacturing difficulty of the protective shell 47.

[0153] Please continue reading. Figure 15bThe second diaphragm assembly 48 is disposed within the protective housing 47. The second speaker unit 4b, through the second diaphragm assembly 48, divides the space within the protective housing 47 into a second front cavity D1 and a second rear cavity D2, which are arranged axially in the speaker module 4. The second front cavity D1 can be located on the side of the second rear cavity D2 opposite to the first bottom wall 431. The second sound outlet 402 communicates with the second front cavity D1. Specifically, the central axis of the second diaphragm assembly 48 is parallel to the central axis of the first diaphragm assembly 44. This reduces the axial dimension of the second speaker unit 4b within the speaker module 4, thus contributing to a reduction in the axial dimension of the speaker module 4.

[0154] Please see Figure 17a , Figure 17a for Figure 15a The image shows a perspective view of the second diaphragm assembly 48 of the second speaker unit 4b. The second diaphragm assembly 48 includes a second fixing portion 481, a second surround 482, and a second dome 483. The second fixing portion 481 is a rounded rectangular ring. (See also...) Figure 17b , Figure 17b for Figure 15b An enlarged view of the N-section region. A stepped portion 474 is provided on the inner circumferential surface of the protective shell 47, and a second fixing portion 481 is stacked on the stepped portion 474. The connection between the second fixing portion 481 and the stepped portion 474 includes, but is not limited to, adhesive bonding. Of course, in some other examples, the protective shell 47 may not have the stepped portion 474, but instead has an annular cylindrical flange structure on the outer edge of the second fixing portion 481, which connects to the inner circumferential surface of the protective shell 47 to fix the second diaphragm assembly 48 inside the protective shell 47.

[0155] The second folding ring 482 is disposed on the outer periphery of the second dome 483 and surrounded by the second fixing part 481. The second dome 483 is rectangular plate-shaped. The second folding ring 482 is a rounded rectangular ring-shaped. The second folding ring 482 is recessed towards the side closer to the second rear cavity D2 to form an arc-shaped or approximately arc-shaped cross-section. This arrangement can save space in the second front cavity D1. Of course, this application is not limited to this. In other embodiments, the second folding ring 482 may also be recessed towards the side closer to the second front cavity D1 to form an arc-shaped or approximately arc-shaped cross-section.

[0156] The second diaphragm assembly 48 can be a single-piece molded component. That is, the second fixing part 481, the second folding ring 482, and the second dome 483 are integrally molded and connected as a whole. This arrangement not only simplifies the manufacturing process and reduces production costs, but also improves the connection strength between the second fixing part 481 and the second folding ring 482, and between the second folding ring 482 and the second dome 483. Of course, this application is not limited to this; in other embodiments, the second fixing part 481, the second folding ring 482, and the second dome 483 can also be manufactured independently and then connected by adhesive or other methods.

[0157] Please continue reading. Figure 15b The reed 4b1 is disposed within the second rear cavity D2 of the second speaker unit 4b and is used to provide driving force for the vibration of the second diaphragm assembly 48. The material of the reed 4b1 includes, but is not limited to, metal.

[0158] Please see Figure 18 , Figure 18 for Figure 15a The diagram shows the structure of the reed 4b1 of the second speaker unit 4b. The reed 4b1 includes a first plate 4b11, a second plate 4b12, and a connecting plate 4b13.

[0159] The first sheet 4b11 is rectangular in shape. The first sheet 4b11 is arranged parallel to the second diaphragm assembly 48. The second sheet 4b12 is rectangular in shape. The second sheet 4b12 is arranged parallel to the second diaphragm assembly 48, and the second sheet 4b12 is located on the side of the first sheet 4b11 away from the second diaphragm assembly 48. The second sheet 4b12 may have the same dimensions as the first sheet 4b11.

[0160] The second piece 4b12 has a support 4b14 extending beyond the edge of the first piece 4b11 at one end, and the support 4b14 is triangular in shape. In some examples, the support 4b14 and the second piece 4b12 can be integrally molded, that is, the support 4b14 and the second piece 4b12 are connected to form a single structural unit. In other examples, the support 4b14 and the second piece 4b12 can be connected by means of adhesive, snap-fit, welding, or threaded connection.

[0161] The shape of the connecting piece 4b13 includes, but is not limited to, "C" and "V" shapes. The connecting piece 4b13 is connected between the end of the second piece 4b12 away from the support 4b14 and the end of the first piece 4b11 away from the support 4b14.

[0162] The spring 4b1 can be a single molded part. That is, the first piece 4b11, the second piece 4b12, and the connecting piece 4b13 are connected as a whole. This arrangement not only simplifies the manufacturing process and reduces production costs, but also improves the connection strength between the first piece 4b11 and the connecting piece 4b13, as well as between the second piece 4b12 and the connecting piece 4b13. Of course, this application is not limited to this. In other embodiments, the first piece 4b11, the second piece 4b12, and the connecting piece 4b13 can also be manufactured independently and then connected by means of gluing or welding.

[0163] Please continue reading. Figure 15b The transmission rod 4b2 is rod-shaped and connects the support body 4b14 and the second dome 483. The transmission rod 4b2 is perpendicular to the second sheet body 4b12. Through the connection of the transmission rod 4b2, the vibration of the reed 4b1 can be transmitted to the second diaphragm assembly 48, thereby causing the second speaker unit 4b to produce sound.

[0164] The material of the transmission rod 4b2 includes, but is not limited to, metal or rigid plastic. The connection method between the transmission rod 4b2 and the second sheet 4b12 includes, but is not limited to, adhesive bonding, welding, snap-fitting, or threaded connection. The connection method between the transmission rod 4b2 and the second diaphragm assembly 48 includes, but is not limited to, adhesive bonding, welding, snap-fitting, or threaded connection.

[0165] Please see Figure 19 and combined Figure 15b , Figure 19 for Figure 15b The diagram shows the structure of the second magnetic circuit system 49 of the second speaker unit 4b. The second magnetic circuit system 49 is located within the second rear cavity D2 of the second speaker unit 4b. The second magnetic circuit system 49 includes a magnetically conductive part 491 and two magnet parts 492.

[0166] The magnetic guide portion 491 is rectangular and annular. The axis of the magnetic guide portion 491 is the same as the axis of the second speaker unit 4b. The first sheet 4b11 is supported on one side surface of the magnetic guide portion 491 adjacent to the second diaphragm assembly 48. The connection between the first sheet 4b11 and the magnetic guide portion 491 includes, but is not limited to, adhesive bonding or snap-fitting.

[0167] Two magnet portions 492 are disposed within the magnetically conductive portion 491 and are arranged opposite to each other. The shape of the magnet portions 492 includes, but is not limited to, a cuboid, a cylinder, or an irregular shape. The magnetization directions of the two magnet portions 492 are opposite. For an example, please refer to [reference needed]. Figure 19For ease of description, one of the two magnet portions 492 is referred to as "first magnet portion 492a", and the other magnet portion 492 is referred to as "second magnet portion 492b". The end of the first magnet portion 492a closest to the second magnet portion 492b is the S pole, and the end of the first magnet portion 492a furthest from the second magnet portion 492b is the N pole. The end of the second magnet portion 492b closest to the first magnet portion 492a is the N pole, and the end of the second magnet portion 492b furthest from the first magnet portion 492a is also the N pole. In this way, a magnetic circuit can be formed between the first magnet portion 492a and the second magnet portion 492b.

[0168] Please continue reading. Figure 19 The second piece 4b12 extends from one axial end of the magnetic conductive part 491 to the other axial end of the magnetic conductive part 491 so that the support 4b14 is located outside the magnetic conductive part 491, and the second piece 4b12 is located between the two magnet parts 492.

[0169] The second voice coil 4b3 is located on one side of the magnetic conductor 491 adjacent to the connecting plate 4b13 in the axial direction, and the second voice coil 4b3 surrounds the outer periphery of the second plate 4b12.

[0170] When the second voice coil 4b3 is energized, it generates a magnetic field, which magnetizes the second plate 4b12 located within it, creating magnetic poles. This creates a driving force between the second voice coil 4b3 and the magnet portion 492, causing the second plate 4b12 to vibrate along the interval between the two magnet portions 492. The vibration of the second plate 4b12 drives the transmission rod 4b2 to vibrate, which in turn drives the second diaphragm assembly 48 to vibrate. The vibration of the second diaphragm assembly 48 then vibrates the air, generating sound waves that are emitted from the second sound outlet 402.

[0171] Please see Figure 20a , Figure 20a A perspective view of the speaker module 4 provided in other embodiments of this application. Figure 20b for Figure 20a The diagram shows a cross-sectional view of the speaker module 4. In this embodiment, the speaker module 4 includes a first speaker unit 4a and a second speaker unit 4b, and the structure of the first speaker unit 4a in this embodiment is similar to... Figure 6a The first speaker unit 4a in the speaker module 4 shown has the same structure, and the second speaker unit 4b in the speaker module 4 in this embodiment has the same structure. Figure 6a The second speaker unit 4b in the speaker module 4 shown has the same structure.

[0172] In this embodiment, the speaker module 4 and Figure 6aThe difference in the speaker module 4 shown is that the number of second speaker units 4b in this embodiment is one. This second speaker module 4 is located on the outer periphery of one of the first contour surfaces 46a of the first magnetic circuit system 46. This allows for the integration of multiple speaker units into one unit while reducing the circumferential size of the speaker module 4, thereby reducing its volume and facilitating its assembly within the limited space of an earphone. Furthermore, the first magnetic circuit system 46 in this embodiment has good structural symmetry, which helps improve the uniformity of the driving force provided by the first magnetic circuit system 46 to the first diaphragm assembly 44, thus avoiding, to some extent, the problem of polarization or rolling vibration in the first diaphragm assembly 44 caused by uneven force distribution.

[0173] Please see Figure 21 , Figure 21 This is a cross-sectional schematic diagram of a speaker module 4 provided in some embodiments of this application. The speaker module 4 in this embodiment includes a first speaker unit 4a and two second speaker units 4b. The speaker module 4 in this embodiment and... Figure 6a The difference between the speaker module 4 shown is that the shape of the outer periphery of the first magnetic circuit system 46 in the first speaker unit 4a of this embodiment is different from that of the second speaker module 4. Figure 6a The outer periphery of the first magnetic circuit system 46 in the first speaker unit 4a shown in the figure has a different shape.

[0174] Specifically, in this embodiment, the outer periphery of the first magnetic circuit system 46 is elliptical, and the two second speaker units 4b can be located at opposite ends of the length of the minor axis of the elliptical first magnetic circuit system 46. Furthermore, to ensure that the sound output of the first speaker unit 4a is not affected by changes in the shape of the first magnetic circuit system 46, the structures of the first voice coil 45, the magnetic gap 465 in the first magnetic circuit system 46, etc., are also adaptively adjusted according to changes in the shape of the first magnetic circuit system 46. Specifically, in this embodiment, the first voice coil 45 is elliptical, the extension path of the magnetic gap 465 in the first magnetic circuit system 46 is elliptical, and the outer contour shape of the central magnet 462 is also elliptical.

[0175] It is understood that in other embodiments, please refer to Figure 22 When the outer periphery of the first magnetic circuit system 46 is elliptical, a second speaker unit 4b may be provided only at one end of the length direction of the minor axis of the elliptical first magnetic circuit system 46.

[0176] Please see Figure 23 , Figure 23This is a cross-sectional schematic diagram of a speaker module 4 provided in some embodiments of this application. The speaker module 4 in this embodiment includes a first speaker unit 4a and two second speaker units 4b. The speaker module 4 in this embodiment and... Figure 6a The difference in the speaker module 4 shown is that the outer contour of the first magnetic circuit system 46 in the first speaker unit 4a of this embodiment is rectangular. The two second speaker units 4b can be located on either side of the width of the rectangle. Furthermore, to ensure that the sound output of the first speaker unit 4a is not affected by changes in the shape of the first magnetic circuit system 46, the structures of the first voice coil 45, the magnetic gap 465 in the first magnetic circuit system 46, etc., in this embodiment are also adaptively adjusted according to changes in the shape of the first magnetic circuit system 46. In this embodiment, the shape of the first voice coil 45, the extension path of the magnetic gap 465 in the first magnetic circuit system 46, and the shape of the central magnet 462 are all the same as the shape of the outer contour of the first magnetic circuit system 46. Specifically, in this embodiment, the first voice coil 45 is a rectangular ring, the extension path of the magnetic gap 465 is a rectangular ring, and the central magnet 462 is formed into a cubic structure.

[0177] It is understood that in other embodiments, please refer to Figure 24 When the outer periphery of the first magnetic circuit system 46 is rectangular, a second speaker unit 4b may be provided only on one side of the width direction of the elliptical first magnetic circuit system 46.

[0178] Please see Figure 25 , Figure 25 An exploded view of a first speaker unit 4a provided in some embodiments of this application. The structure of the first speaker unit 4a in this embodiment is similar to... Figure 8a The difference between the first speaker unit 4a shown in this embodiment and the first speaker unit 4a in this embodiment is that the shape of the outer periphery of the first magnetic circuit system 46 is different. Figure 8a The outer periphery of the first magnetic circuit system 46 in the first speaker unit 4a shown in the figure has a different shape.

[0179] Specifically, in this embodiment, the outer periphery of the first magnetic circuit system 46 is square. In this embodiment, the shapes of the first voice coil 45, the magnetic gap 465 of the first magnetic circuit system 46, and the central magnet 462 are all adapted to the shape of the outer periphery of the first magnetic circuit system 46. Thus, all four contour surfaces of the first magnetic circuit system 46 can provide clearance for the assembly of the second speaker unit 4b, thereby increasing the number of second speaker units 4b and improving the sound output of the speaker module 4. Simultaneously, setting the outer periphery of the first magnetic circuit system 46 to a square makes the structure of the first speaker unit 4a more compact, which is beneficial for increasing the volume of the first magnetic circuit system 46, thereby increasing the driving strength of the first diaphragm.

[0180] Furthermore, the first magnetic circuit system 46 in this embodiment only includes Figure 8a The first speaker unit 4a shown includes the magnetic cup 461, the central magnet 462, and the magnetic yoke 463 of the first magnetic circuit system 46, but does not include... Figure 8a The auxiliary magnet 464 of the first magnetic circuit system 46 in the first speaker unit 4a shown.

[0181] Please see Figure 26 , Figure 26 for Figure 25 The diagram shows the assembly of the first speaker unit 4a and the second speaker unit 4b. In this embodiment, there are four second speaker units 4b, which are respectively arranged on the outer periphery of the four contour surfaces of the first magnetic circuit system 46. In this embodiment, the first sound outlet of the first speaker unit 4a can be formed on the first bottom wall 431.

[0182] Please see Figure 27 When the outer periphery of the first magnetic circuit system 46 is square, three second speaker units 4b can also be arranged on the outer periphery of the first magnetic circuit system 46.

[0183] It is understood that when the outer periphery of the first magnetic circuit system 46 is square, two second speaker units 4b or one second speaker unit 4b can be arranged around the outer periphery of the first magnetic circuit system 46. The specific number of second speaker units 4b can be adjusted according to actual needs. In other embodiments, the outer periphery of the first magnetic circuit system 46 can also be formed into other shapes such as circles.

[0184] Please see Figure 28 , Figure 28 A cross-sectional view of a first speaker unit 4a provided in some other embodiments of this application. The structure of the first speaker unit 4a in this embodiment is similar to... Figure 8a The difference in the structure of the first speaker unit 4a shown in this embodiment is that the structure of the first frame 43 in the first speaker unit 4a of this embodiment is different from that of the first speaker unit 4a shown in this embodiment. Figure 8a The structure of the first speaker unit 4a in this embodiment differs from that of the first speaker unit 4a. Specifically, the first speaker unit 43 in this embodiment includes, in addition to, the structure of the first speaker unit 4a is different from that of the first speaker unit 4a. Figure 8a In addition to the first bottom wall 431 and the first peripheral wall 432, the first basin stand 43 shown also includes an annular flange 433. The annular flange 433 is disposed on the second wall surface 4312 of the first bottom wall 431 and surrounds the outer periphery of the through opening 4313. In this embodiment, the first basin stand 43 can be connected to the first magnetic circuit system 46 by means of the annular flange 433. The shape of the annular flange 433 is adapted to the shape of the outer peripheral contour of the first magnetic circuit system 46.

[0185] Based on any of the above embodiments, please refer to Figure 29a , Figure 29a This is a perspective view of a speaker module 4 provided in other embodiments of this application. In addition to the first speaker unit 4a and the second speaker unit 4b described in the above embodiments, the speaker module 4 in this embodiment also includes a sound outlet duct 4c, which includes a first sound outlet duct 4c1 and a second sound outlet duct 4c2. The first sound outlet duct 4c1 connects the first sound outlet 401 to the sound outlet 110 of the earphone 100, and the second sound outlet duct 4c2 connects the second sound outlet 402 to the sound outlet 110 of the earphone 100. One end of the first sound outlet duct 4c1 is connected to the first sound outlet 401 of the first speaker unit 4a, and the other end of the first sound outlet duct 4c1 extends in a direction away from the first speaker unit 4a. One end of the second sound outlet duct 4c2 is connected to the second sound outlet 402 of the second speaker unit 4b, and the other end of the second sound outlet duct 4c2 extends in a direction away from the first speaker unit 4a, and the second sound outlet duct 4c2 is separated from the first sound outlet duct 4c1.

[0186] Please see Figures 29b-29d , Figure 29b for Figure 29a The top view of speaker module 4 shown. Figure 29c For along Figure 29b Sectional view of the FF line. Figure 29d For along Figure 29b A cross-sectional view of the GG line.

[0187] Please see Figure 29c and combined Figure 29d The sound outlet duct 4c includes a first sound outlet tube 4c3, which is located on the side of the first frame 43 opposite to the first diaphragm assembly 44. The interior of the first sound outlet tube 4c3 is hollow, thus defining the first sound outlet duct 4c1 within the first sound outlet tube 4c3. For details, please refer to [link / reference]. Figure 29d The first sound outlet tube 4c3 includes a first tube segment 4c31 and a second tube segment 4c32. One axial end of the first tube segment 4c31 is connected to the first frame 43, and the other axial end of the first tube segment 4c31 extends in a direction away from the first frame 43. The second tube segment 4c32 is connected to the other axial end of the first tube segment 4c31 and extends in a direction away from the first frame 43. Optionally, the first tube segment 4c31 can be formed into a cylindrical tubular structure, and the second tube segment 4c32 can be formed into a tapered tubular structure.

[0188] In some embodiments, please refer to Figure 29e , Figure 29e for Figure 29aThe image shows a perspective view of the sound outlet pipe 4c in the speaker module 4. The first pipe section 4c31 has a first notch 4c33 to allow passage of the second speaker unit 4b. This facilitates the assembly of the first sound outlet pipe 4c3 and reduces the assembly difficulty of the first sound outlet pipe 4c3.

[0189] Please continue reading. Figures 29c-29e The second sound outlet tube 4c4 is fitted outside the first sound outlet tube 4c3, defining the aforementioned second sound outlet duct 4c2 between the first sound outlet tube 4c3 and the second sound outlet tube 4c4. The shape of the second sound outlet tube 4c4 is adapted to the shape of the first sound outlet tube 4c3. Specifically, the second sound outlet tube 4c4 includes a connected third tube segment 4c41 and a fourth tube segment 4c42. The shape of the third tube segment 4c41 is the same as that of the first tube segment 4c31 and surrounds the outer periphery of the first tube segment 4c31. The shape of the fourth tube segment 4c42 is the same as that of the second tube segment 4c32 and surrounds the outer periphery of the second tube segment 4c32. In this way, the second sound outlet duct 4c2 can be conveniently defined between the first sound outlet tube 4c3 and the second sound outlet tube 4c4, and the structure of the sound outlet duct 4c can be made more compact, which is beneficial to reducing the size of the speaker module 4 and making it easier to assemble the speaker diaphragm 4 in the space-constrained headphone 100.

[0190] In some embodiments, the third tube segment 4c41 is provided with a second notch 4c43 for avoiding the second speaker unit 4b. This facilitates the assembly of the second sound tube 4c4 and helps to reduce the assembly difficulty of the second sound tube 4c4.

[0191] The sound outlet pipe 4c can be installed on the first basin frame 43 by means of bonding, welding, snap-fitting, riveting, etc.

[0192] Please see Figure 29f , Figure 29f for Figure 29a The diagram shows a cross-sectional view of the speaker module 4 applied within the headphone 100. Sound emitted from the first sound outlet 401 of the first speaker unit 4a can be transmitted to the sound outlet 110 of the headphone 100 via the first sound outlet 4c1, and sound emitted from the second sound outlet 402 of the second speaker unit 4b can be transmitted to the sound outlet 110 of the headphone 100 via the second sound outlet 4c2. Since the first sound outlet 4c1 and the second sound outlet 4c2 are separated from each other, interference between the sound emitted by the first speaker unit 4a and the sound emitted by the second speaker unit 4b is avoided, effectively improving the sound effect of the speaker module 4.

[0193] It is understood that in other embodiments, the aforementioned sound outlet duct can also be formed within the housing 1 of the earphone 100. During assembly, the sound outlet duct 4c and the speaker module 4 can be independently assembled within the housing 1 of the earphone 100. Optionally, the sound outlet duct and the housing of the earphone 100 are an integral structure. For example, the sound outlet duct 4c and the housing 1 of the earphone 100 can be integrally injection molded. In this way, interference between the sound emitted by the first speaker unit 4a and the sound emitted by the second speaker unit 4b can also be avoided, effectively improving the sound effect of the speaker module 4.

[0194] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0195] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A speaker module, characterized in that, include: The first loudspeaker unit includes a first frame, a first diaphragm assembly, a first voice coil, and a first magnetic circuit system. The first frame includes a first bottom wall and a first peripheral wall. The first peripheral wall is arranged around the outer edge of the first bottom wall. The first bottom wall includes a first wall surface and a second wall surface facing away from each other. The first peripheral wall includes a first end surface and a second end surface facing away from each other. The first end surface faces away from the second wall surface and protrudes from the first wall surface. The first diaphragm assembly is supported on the first end surface. The first voice coil is fixed on the first diaphragm assembly. A through-hole is formed on the first bottom wall, penetrating the first wall surface and the second wall surface. The first magnetic circuit system is fixed at the through-hole and protrudes from the second wall surface. The first voice coil cooperates with the first magnetic circuit system to drive the first diaphragm assembly to vibrate. An installation space is defined between the second wall surface and the outer peripheral surface of the first magnetic circuit system. The second speaker unit is fixed within the mounting space.

2. The speaker module according to claim 1, characterized in that, The orthographic projection of the second speaker unit on the reference plane is the first projection, and the orthographic projection of the first speaker frame on the reference plane is the second projection. The first projection is located within the outer contour of the second projection. The reference plane is perpendicular to the central axis of the first speaker unit.

3. The speaker module according to claim 1, characterized in that, The maximum distance between the end face of the second speaker unit away from the reference plane and the reference plane is the first distance, and the maximum distance between the end face of the first magnetic circuit system away from the reference plane and the reference plane is the second distance, wherein the first distance is less than or equal to the second distance; The reference plane is perpendicular to the central axis of the first speaker unit, and the reference plane is located on the side of the first diaphragm assembly opposite to the first magnetic circuit system.

4. The speaker module according to any one of claims 1-3, characterized in that, The first bottom wall is annular, and the first magnetic circuit system is fixed to the inner edge of the first bottom wall.

5. The speaker module according to any one of claims 1-3, characterized in that, The first bottom wall has a limiting groove recessed in the direction of approaching the first diaphragm group on the side surface opposite to the first diaphragm group, and at least a portion of the second speaker unit is disposed in the limiting groove.

6. The speaker module according to any one of claims 1-3, characterized in that, There are multiple second speaker units, which are arranged circumferentially in the first magnetic circuit system.

7. The speaker module according to claim 6, characterized in that, There are two second speaker units, which are symmetrically arranged on both sides of the first magnetic circuit system.

8. The speaker module according to any one of claims 1-3, characterized in that, The first magnetic circuit system includes a first profile surface, and the second speaker unit is disposed on the outer periphery of the first profile surface.

9. The speaker module according to claim 8, characterized in that, The second speaker unit includes a second profile surface that is adapted to the first profile surface.

10. The speaker module according to claim 9, characterized in that, The first contour surface is formed as a plane.

11. The speaker module according to claim 8, characterized in that, There are two first contour surfaces, which are symmetrically arranged on both sides of the first magnetic circuit system.

12. The speaker module according to claim 11, characterized in that, The two first contour surfaces are parallel to each other.

13. The speaker module according to claim 11 or 12, characterized in that, The two first contour surfaces define a first opening and a second opening in the circumferential direction of the first magnetic circuit system. The outer circumferential surface of the first magnetic circuit system also includes a third contour surface disposed at the first opening and a fourth contour surface disposed at the second opening. The third contour surface and the fourth contour surface are symmetrically disposed on both sides of the first magnetic circuit system.

14. The speaker module according to claim 13, characterized in that, Both the third and fourth contour surfaces are formed as arc surfaces that arch towards a direction away from the central axis of the first magnetic circuit system.

15. The speaker module according to claim 13, characterized in that, Both the third contour surface and the fourth contour surface are formed as planes.

16. The speaker module according to claim 15, characterized in that, The outer periphery of the first magnetic circuit system is rectangular.

17. The speaker module according to claim 16, characterized in that, The outer perimeter of the first magnetic circuit system is square.

18. The loudspeaker module according to claim 13, characterized in that, The first magnetic circuit system has a magnetic gap, the extension path of which is the same as the extension path of the outer periphery of the first magnetic circuit system, and the magnetic gap is adapted to the first voice coil.

19. The loudspeaker module according to claim 18, characterized in that, The magnetic gap includes a first gap portion, a second gap portion, a third gap portion, and a fourth gap portion connected end to end in sequence. The extension paths of the first gap portion and the third gap portion along the circumferential direction of the first magnetic circuit system are the same as the extension path of the first contour surface. The extension paths of the second gap portion along the circumferential direction of the first magnetic circuit system are the same as the extension path of the third contour surface. The extension paths of the fourth gap portion along the circumferential direction of the first magnetic circuit system are the same as the extension path of the fourth contour surface.

20. The loudspeaker module according to claim 19, characterized in that, The first gap portion and the third gap portion extend in a straight line in the circumferential direction of the first magnetic circuit system, while the second gap portion and the fourth gap portion extend in an arc in the circumferential direction of the first magnetic circuit system.

21. The speaker module according to claim 19 or 20, characterized in that, The first voice coil includes a first segment, a second segment, a third segment, and a fourth segment connected end to end. The first segment is adapted to the first gap portion, the second segment is adapted to the second gap portion, the third segment is adapted to the third gap portion, and the fourth segment is adapted to the fourth gap portion.

22. The speaker module according to claim 21, characterized in that, The first segment and the third segment are both formed as flat plates, while the second segment and the fourth segment are formed as arc-shaped plates that arch away from the central axis of the first speaker unit.

23. The loudspeaker module according to any one of claims 1-3, characterized in that, The outer periphery of the first magnetic circuit system is elliptical or circular.

24. The loudspeaker module according to any one of claims 1-3, characterized in that, The first diaphragm assembly includes a first dome, the first dome including a flat portion formed in the shape of a plate, and the first voice coil is fixed on the flat portion.

25. The speaker module according to claim 24, characterized in that, The first dome also includes a protrusion located inside the flat portion and connected to the flat portion, the protrusion protruding in a direction away from the first magnetic circuit system.

26. The speaker module according to claim 25, characterized in that, The first voice coil surrounds the outer periphery of the protrusion, and the outer contour shape of the protrusion projected onto the reference plane is the same as the shape of the first voice coil; the reference plane is perpendicular to the central axis of the first speaker unit.

27. The loudspeaker module according to any one of claims 1-3, characterized in that, The second speaker unit is a moving iron speaker or a planar speaker.

28. The loudspeaker module according to any one of claims 1-3, characterized in that, The first speaker unit has a first sound outlet, and the second speaker unit has a second sound outlet, wherein the sound outlet direction of the first sound outlet is consistent with the sound outlet direction of the second sound outlet.

29. The speaker module according to claim 28, characterized in that, It also includes a sound outlet pipe, which has a first sound outlet channel and a second sound outlet channel. One end of the first sound outlet channel is connected to the first sound outlet hole, and the other end of the first sound outlet channel extends in a direction away from the first speaker unit. One end of the second sound outlet channel is connected to the second sound outlet hole, and the other end of the second sound outlet channel extends in a direction away from the first speaker unit, and the second sound outlet channel is separated from the first sound outlet channel.

30. The loudspeaker module according to claim 29, characterized in that, The sound output pipe includes: The first sound tube is located on the side of the first frame away from the first diaphragm assembly, and the first sound tube defines the first sound outlet channel. The second sound tube is sleeved outside the first sound tube and spaced apart from the first sound tube, and the second sound tube and the first sound tube define the second sound channel.

31. An earphone, characterized in that, include: A housing having a sound outlet formed thereon; A speaker module, wherein the speaker module is a speaker module according to any one of claims 1-28, the speaker module is disposed in the housing, and the sound signal generated by the first speaker unit and the sound signal generated by the second speaker unit are both output from the sound outlet.

32. The earphone according to claim 31, characterized in that, The first speaker unit has a first sound outlet, the second speaker unit has a second sound outlet, and the housing is provided with a first sound outlet channel and a second sound outlet channel that are separated from each other. The first sound outlet channel is used to connect the first sound outlet and the sound outlet, and the second sound outlet channel is used to connect the second sound outlet and the sound outlet.

33. An earphone, characterized in that, include: A housing having a sound outlet formed thereon; A speaker module, wherein the speaker module is as described in claim 29 or 30, the speaker module is disposed inside the housing, and the sound signal generated by the first speaker unit and the sound signal generated by the second speaker unit are both output from the sound outlet.

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