earphone

Abstract

The earphone disclosed by the embodiment of the present application comprises an ear shell, an electric control board, a loudspeaker unit, a feedback microphone and a first electric connecting piece. The ear shell comprises a main shell and an outlet nozzle connected with the main shell. The main shell is provided with a mounting cavity. The outlet nozzle is provided with an outlet channel communicated with the mounting cavity and an outlet hole communicated with the outlet channel. The electric control board is arranged in the mounting cavity. The loudspeaker unit is arranged in the outlet channel. The loudspeaker unit comprises a shell and an electric connecting pin exposed on the shell. The feedback microphone is arranged in the outlet channel. The feedback microphone is arranged on the sound outlet side of the loudspeaker unit along the axial direction of the outlet channel and is arranged in a spaced manner with the loudspeaker unit. The first electric connecting piece electrically connects the electric connecting pin and the electric control board. Based on the earphone of the embodiment of the present application, the printed circuit board of the loudspeaker unit is cancelled, and the electric connecting pin is directly exposed on the shell, so that the volume of the earphone can be reduced.

Description

Technical Field

[0001] This application relates to the field of headphones, and more specifically, to a type of headphone. Background Technology

[0002] In related technologies, in-ear headphone structures typically house the speaker within a cavity inside the main shell, and include a sound outlet tube. An ear cap is fitted over the sound outlet tube, and the sound emitted by the speaker travels through the sound outlet tube to the user's ear canal. The ear cap is used to hold and seal the headphone in the user's ear canal. However, this design results in relatively large in-ear headphones, which is inconvenient for users, especially when sleeping, as the larger size makes them unsuitable for side-sleeping scenarios. Utility Model Content

[0003] This application provides an earphone designed to reduce the size of in-ear headphones.

[0004] This application provides an earphone, including an ear shell, an electronic control board, a speaker unit, a feedback microphone, and a first electrical connector. The ear shell includes a main shell and a sound outlet connected to the main shell. The main shell has a mounting cavity, and the sound outlet has a sound outlet channel communicating with the mounting cavity and a sound outlet hole communicating with the sound outlet channel. The electronic control board is disposed in the mounting cavity. The speaker unit is disposed in the sound outlet channel. The speaker unit includes a housing and power pins exposed on the housing. The feedback microphone is disposed in the sound outlet channel and is arranged along the axial direction of the sound outlet channel on the sound outlet side of the speaker unit and spaced apart from the speaker unit. The first electrical connector electrically connects the power pins and the electronic control board.

[0005] Based on this embodiment, the speaker unit is moved out of the mounting cavity of the main shell and installed in the sound outlet channel. This is equivalent to installing a relatively large sound unit in a narrower space, which allows the main shell to be made smaller, thereby reducing the overall size and outline of the headphones. This greatly improves the comfort and convenience of wearing in-ear headphones, especially those that need to be worn in scenarios such as sleep. In particular, it reduces the pressure of the headphones on the auricle and cheek when sleeping on your side.

[0006] Furthermore, compared to related technologies, the speaker unit comes with a small printed circuit board (PCBA) with pads. Electrical connections are achieved by setting wires, with one end of the wire soldered to the pads on the PCBA and the other end soldered to the main control board. Since the PCBA occupies some space, it is more difficult to operate in the small sound output channel.

[0007] In this embodiment, the speaker unit eliminates the need for a PCBA and directly exposes the power pins on the housing. The first electrical connector directly connects the power pins to the control board, extending the original soldering location to the outside of the speaker unit. On the one hand, this eliminates the need to reserve space for the PCBA and original solder joints, reducing the height of the speaker unit. On the other hand, extending the connection point to the outside of the speaker unit allows the connection operation to be performed in a more spacious and easier-to-operate space, significantly reducing the connection difficulty and improving production efficiency and yield. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the structure of the earphone in one embodiment of this application;

[0010] Figure 2 for Figure 1 A structural diagram of the structure shown from another angle (ear wings and ear caps omitted);

[0011] Figure 3 For along Figure 2 A schematic diagram of a cross-sectional structure of line AA in the middle;

[0012] Figure 4 for Figure 3 Enlarged structural diagram at point B;

[0013] Figure 5 for Figure 1 A schematic diagram of the internal structure of the structure shown;

[0014] Figure 6 for Figure 5 A schematic diagram of the exploded structure shown;

[0015] Figure 7 for Figure 1 A structural diagram of the structure shown from another angle;

[0016] Figure 8 for Figure 7 A schematic diagram of the exploded structure shown;

[0017] Figure 9 for Figure 7 Another exploded structural diagram of the structure shown;

[0018] Figure 10 for Figure 7Another internal structural diagram of the structure shown;

[0019] Figure 11 for Figure 10 A schematic diagram of the exploded structure shown;

[0020] Figure 12 for Figure 7 A schematic diagram of the exploded structure of the part shown.

[0021] Figure 13 This is a schematic diagram of the protective net structure in one embodiment of this application;

[0022] Figure 14 This is a schematic diagram of the internal structure of the earphone in another embodiment of this application;

[0023] Figure 15 for Figure 14 A schematic diagram of the exploded structure shown;

[0024] Figure 16 This is a top view schematic diagram of some of the headphones provided in some embodiments of this application;

[0025] Figure 17 This is a top view of some of the earphones provided in other embodiments of this application;

[0026] Figure 18 This is a top view schematic diagram of some of the headphones provided in some embodiments of this application;

[0027] Figure 19 This is a top view structural diagram of some of the headphones provided in other embodiments of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Earphone; 10. Ear shell; 11. Main shell; 11a. Mounting cavity; 111A. Main body; 111A1. First mounting cavity; 112A. Protrusion; 112A1. Second mounting cavity; 112A2. Sound pickup hole; 112A3. Rear cavity tuning hole; 111B. Front shell; 111B1. Front shell ventral surface; 111B2. Front shell side surface; 111B3. Snap-fit ​​groove; 112B. Rear shell; 12. Sound outlet; 12a. Sound outlet channel; 12b. Sound outlet; 12c. Limiting groove; 12d. Fixing groove; 12e. Accommodating space; 121. Annular protrusion; 10a. Pressure relief channel; 20. Ear wing; 21. Fixing sleeve; 22. Supporting part; 30. Ear cap; 30a. Pressure relief groove; 30b. Speaker hole; 31. Annular recess; 40. Charging part; 50. Magnet; 60. Antenna; 70. Feedforward microphone; 80. Feedback microphone; 90. Battery; 91. Speaker unit Body; 911, Outer shell; 911a, Connecting surface; 912, Power pin; 913, Fixed bracket; 913A, Support frame; 9131, Support arm; 9132, Support part; 9132a, Positioning groove; 913B, Fixing ring; 92, Protective net; 92a, Hollow hole; 921, Protective part; 922, Connecting part; 9221, Flanged edge; 923, Support part; 9231, Support foot; 93, First reinforcing plate; 94, Second reinforcing plate ; 94a, Through hole; 941, Reinforcing part; 942, Positioning part; 95, Electrical connector; 951, First electrical connector; 951a, Clearing hole; 9511, First connecting section; 9512, Second connecting section; 9513, Third connecting section; 9514, First extension; 9515, Bending part; 9516, Second extension; 952, Second electrical connector; 96, Electrical control board; 961, Contact point; 97, Mesh fabric; 98, Protective adhesive. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0031] Headphones (Earphones, Headphones, Head-sets, Earpieces) are a pair of transducers that receive electrical signals from a media player or receiver and convert them into audible sound waves using speaker drivers placed close to the ears.

[0032] From the perspective of the overall development of the audio industry, wireless headphones are still a relatively new product. Wireless headphones utilize Bluetooth technology to achieve a wire-free connection, allowing users to transmit audio wirelessly to their phones or other devices. The main advantages of wireless headphones include the absence of wires, portability, and ease of use, making them particularly suitable for use during exercise.

[0033] Wireless headphones can be divided into in-ear headphones and out-of-ear headphones. In-ear headphones have a relatively long and thin tube that needs to be fully inserted into the user's ear canal, effectively isolating external environmental noise. Out-of-ear headphones, on the other hand, do not penetrate deep into the ear canal, so they put less pressure on the ear canal and are generally more comfortable to wear for extended periods.

[0034] This embodiment uses an in-ear headphone as an example for explanation. In other embodiments, the headphone may have other structures, such as a semi-in-ear structure. The shape and structure of the headphone are not limited to the design described above. In the relevant technical field, the shape and structure design of headphones is very mature, and headphones can adopt various shape and structure as needed, which will not be described in detail here.

[0035] In related technologies, in-ear headphones include a main shell and a sound tube. The speaker unit is set in a cavity inside the main shell and transmits sound to the ear canal opening through the sound tube. This results in a large main shell, which is not conducive to the user's wearing and use. Especially in the user's sleep scenario, the large headphones are easy to compress the auricle and cheek when sleeping on the side, causing discomfort and affecting sleep quality.

[0036] To solve the above problems, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this application proposes an earphone 100, including an ear shell 10. The ear shell 10 is the main external structure of the earphone 100, and its interior has space for accommodating electronic components and forming an acoustic structure. The ear shell 10 includes a main shell 11 and a sound outlet 12. The main shell 11 is the main body of the ear shell 10, and a mounting cavity 11a is provided inside the main shell 11. The sound outlet 12 is connected to the main shell 11 and is the part of the earphone 100 responsible for guiding sound to the user's ear. The shape of the sound outlet 12 can be cylindrical, elliptical, oblique, etc. Furthermore, a sound outlet channel 12a communicating with the mounting cavity 11a is provided inside, and a sound outlet hole 12b communicating with the sound outlet channel 12a is also provided on the sound outlet 12b. When the earphone 100 is worn, the sound outlet hole 12b is positioned facing the user's ear canal opening.

[0037] In this embodiment, the diameter of the sound outlet 12 is 3mm-6mm, and the length is 3mm-10mm. If the diameter of the sound outlet 12 is less than 3mm, the sound propagation channel will be too narrow, causing significant sound wave diffraction and reflection, resulting in severe attenuation of high-frequency sounds and a muffled sound quality. At the same time, an excessively small opening can also cause excessive pressure inside the listener's ear, resulting in discomfort. Conversely, if the diameter is greater than 6mm, although it can provide a smoother sound channel and reduce high-frequency loss, an excessively large opening will cause the sound to be too diffuse and its directivity to deteriorate, resulting in sound energy loss in the external environment of the headphones 100, reducing the focus and efficiency of the sound. At the same time, a larger diameter may also increase the discomfort when the headphones 100 are worn by the user, which is not conducive to the miniaturization of the headphones 100. Similarly, if the length of the sound outlet 12 is less than 3mm, the path of sound waves from the speaker to the ear canal will be too short, lacking sufficient acoustic impedance matching and acoustic filtering, causing the sound to directly impact the ear canal and affecting the overall listening experience. While a length exceeding 10mm might offer some acoustic optimization, an excessively long conduit would increase sound transmission loss, particularly in the high-frequency range, resulting in a muffled sound. It would also increase the complexity and space required for the internal structure of the headphone 100, thus enlarging its overall size. Therefore, the diameter of the sound outlet 12 is limited to 3mm-6mm, and its length to 3mm-10mm.

[0038] Furthermore, the main housing 11 can be made of metal, such as, but not limited to, stainless steel, aluminum alloy, titanium alloy, magnesium alloy, copper alloy, etc. Compared to materials such as plastic, the main housing 11 made of metal has a lower lower limit for its wall thickness due to its strength and manufacturing process, which allows the sound outlet 12 of the earphone 100 to have a smaller wall thickness, thus helping to reduce the outer diameter and other dimensions of the nozzle 400. The wall thickness of the sound outlet 12 can be 0.1-0.3 mm, for example, 0.15 mm, 0.2 mm, 0.25 mm, etc. Moreover, compared to materials such as plastic, the metal nozzle 400 has higher rigidity under the same wall thickness, is less prone to deformation, which helps to reduce resonance during use, improve the sound quality of the earphone 10, and also helps to improve the structural strength of the sound outlet 12.

[0039] like Figure 3 and Figure 4 As shown, the headphones 100 also include an electronic control board 96, a speaker unit 91, and a feedback microphone 80. The electronic control board 96 is located within the mounting cavity 11a. The electronic control board 96 controls the overall function of the headphones 100, processes audio signals, manages power, and serves as a connection hub for other electronic components. The speaker unit 91 is the core component of the headphones 100 for sound playback. It converts electrical signals into sound waves, which then vibrate a sound-producing unit (such as a diaphragm) to push air, thereby producing the sound heard by the user.

[0040] The speaker driver 91 is located within the sound exit channel 12a, which is the main path for sound to travel from the speaker driver 91 to the ear canal. Placing the speaker driver 91 within the sound exit channel 12a ensures that sound propagates in the most direct way. The feedback microphone 80 is located within the sound exit channel 12a. The feedback microphone 80 is used to pick up sound near the user's ear canal opening or inside the headphone 100 cavity, primarily for active noise cancellation. The feedback microphone 80 is arranged axially along the sound exit channel 12a on the sound exit side of the speaker driver 91 to reduce the radial space occupied by the feedback microphone 80 and the speaker driver 91 in the sound exit channel 12a. The sound exit side of the speaker driver 91 is where sound is about to leave the speaker driver 91 and enter the user's ear canal. Placing the feedback microphone 80 here is the most direct and closest position to the target sound field. If the feedback microphone 80 is too far from the target sound field (e.g., placed behind the user), the picked-up signal will be distorted, containing more sound from non-target paths, resulting in inaccurate generated anti-phase sound waves and significantly reduced noise cancellation effect.

[0041] Furthermore, the feedback microphone 80 and the speaker unit 91 are arranged at intervals. If the feedback microphone 80 and the speaker unit 91 are too close, the feedback microphone 80 may not be able to accurately capture ambient noise, and instead will receive more sound directly emitted by the speaker unit 91. The interval arrangement helps the feedback microphone 80 to more accurately collect residual noise in the listening area, thereby improving the effect of active noise cancellation.

[0042] Along the axial direction of the sound outlet channel 12a, the distance between the speaker unit 91 and the feedback microphone 80 is 0.2mm-0.5mm. The sound outlet 12 itself has a relatively small structure. If the distance between them were greater, it would occupy more space along the axial direction of the sound outlet channel 12a, requiring either an increase in the length of the sound outlet 12 or compression of other components, directly increasing the size of the sound outlet 12 and even the entire earpiece 10. By controlling the distance between them within this extremely small range of 0.2-0.5mm, the axial arrangement efficiency inside the sound outlet 12 is optimized. This allows the speaker unit 91 and the feedback microphone 80 to be arranged compactly, minimizing their space occupation in the axial direction of the sound outlet channel 12a. This compact arrangement allows for a shorter and more compact structure of the sound outlet 12 while maintaining acoustic performance (such as the aforementioned accurate sound pickup).

[0043] Based on this embodiment, the headphone 100 removes the speaker unit 91 from the mounting cavity 11a of the main housing 11 and installs it in the sound outlet channel 12a. This is equivalent to installing a relatively large sound-producing unit in a narrower space, which allows the main housing 11 to be made smaller, thereby reducing the overall size and outline of the headphone 100. This greatly improves the comfort and convenience of wearing in-ear headphones 100, especially those that need to be worn in scenarios such as sleep. In particular, it reduces the pressure of the headphone 100 on the auricle and cheek when sleeping on one's side.

[0044] Please see Figure 5 and Figure 6 The loudspeaker unit 91 includes a housing 911, a magnetic circuit system, and a vibration system. Both the magnetic circuit system and the vibration system are housed within the housing 911. The housing 911 can prevent damage to the magnetic circuit system and the vibration system. The housing 911 can also limit the position of the magnetic circuit system, allowing it to move stably and linearly in the magnetic field. The vibration system includes a voice coil and a diaphragm. The voice coil is the component that drives the diaphragm to vibrate.

[0045] For the voice coil to be energized and move, current must flow into it and form a complete circuit within it. Therefore, the loudspeaker unit 91 also includes a power pin 912 exposed in the housing 911. The power pin 912 guides the external audio current signal to the voice coil of the loudspeaker unit 91, allowing the voice coil to generate corresponding mechanical movement in the magnetic field according to changes in the current signal, thereby driving the diaphragm to produce sound. The power pin 912 can be understood as a voice coil pin, and its function is still to ensure that the voice coil pin receives current, thus enabling the voice coil to work.

[0046] Compared to related technologies, the speaker unit 91 has a small printed circuit board (PCBA) with pads. Electrical connections are achieved by setting wires. One end of the wire is soldered to the pads of the PCBA, and the other end is soldered to the main control board. Since the PCBA occupies some space, it is more difficult to operate in the small sound output channel 12a.

[0047] In this embodiment, the earphone 100 also includes a first electrical connector 951, which directly connects the power pin 912 and the electronic control board 96. The first electrical connector 951 can be soldered to the power pin 912, so that the electrical signal (audio current) from the electronic control board 96 can flow smoothly into the voice coil, causing the voice coil to vibrate.

[0048] In this embodiment, the speaker unit 91 eliminates the need for a PCBA and directly exposes the power pins 912 on the housing 911. The first electrical connector 951 directly connects the power pins 912 and the control board 96, extending the original soldering position to the outside of the speaker unit 91, so that the external first electrical connector 951 can directly contact and connect these power pins 912.

[0049] On the one hand, by eliminating the space inside the speaker unit 91 originally used to house the PCBA board and its related solder joints, this redundancy in volume and height is completely eliminated. This not only directly reduces the height profile of the speaker unit 91 itself, making it flatter, but also shortens the axial height of the sound outlet 12, allowing it to be made smaller and reducing intrusion into the ear canal. On the other hand, extending the connection point to the outside of the speaker unit 91 allows the connection operation to be performed in a more spacious and easier-to-operate space, significantly reducing the difficulty of connection, improving production efficiency and yield. In a more easily operable environment, the probability of problems such as poor connection and cold solder joints is greatly reduced, thereby reducing rework and scrap caused by connection problems, ultimately reducing overall production costs and improving product quality stability.

[0050] Among them, the first electrical connector 951 is a flexible circuit board (FPC). The flexible circuit board has the characteristics of being bendable and foldable, which can adapt well to the complex and limited space inside the sound outlet 12. The FPC can be easily bent or twisted to connect the power pin 912 with the shortest and most direct path. The wiring is carried out along the curved surface or internal structure of the ear shell 10, making the overall internal layout more compact and conducive to the miniaturization of the earphone 100.

[0051] In some embodiments, the first electrical connector 951 includes a first connecting segment 9511 and a second connecting segment 9512 connected together. The first connecting segment 9511 is attached to the housing 911 and electrically connected to the power pin 912, enabling direct and close contact with the power pin 912 of the speaker unit 91. This minimizes the possibility of contact resistance and signal interference, ensuring the stability and accuracy of signal transmission and laying a solid foundation for subsequent audio signal processing. The second connecting segment 9512 is separately disposed from the housing 911 and extends from the first connecting segment 9511 toward the control board 96. This allows a portion of the first electrical connector 951 to be flexibly bent or twisted, enabling the connection path to be laid along the optimal, shortest, and least interference-prone trajectory inside the headphone 100, adapting to the complex curved surfaces and spatial layout inside the headphone 100.

[0052] Furthermore, the housing 911 is provided with a connecting surface 911a, which is one end face of the speaker unit 91 facing away from the sound outlet 12b. Taking a cylindrical speaker unit 91 as an example, if the sound outlet side is one end of the cylinder, then the connecting surface 911a is the other end surface opposite to that end, i.e., the other end of the cylinder. In a specific configuration, the power-connecting pin 912 protrudes from the connecting surface 911a, making it easier for the first connecting segment 9511 to directly cover it and form a stable electrical connection. This avoids poor contact problems caused by the housing 911 blocking the connection, thereby ensuring the stability and accuracy of electrical signal transmission. The first connecting segment 9511 covers a portion of the connecting surface 911a, further enhancing the contact area between the power-connecting pin 912 and the first connecting segment 9511, thus improving stability. The electrical connection path in this embodiment is direct and simple, avoiding complex wiring requirements and making the internal wiring of the earphone 100 more compact, thereby providing greater possibilities for the miniaturization of the earphone 100.

[0053] Considering that the speaker unit 91 will vibrate when it is working, and the first electrical connector 951 (especially the FPC) is relatively soft, direct connection to the power pin 912 may cause unstable connection or even disconnection due to vibration. This is directly related to the user experience and may cause intermittent sound quality, signal loss, or even complete failure of the headphones 100.

[0054] like Figure 4 , Figure 5 and Figure 6 As shown, to address this issue, in some embodiments, the earphone 100 further includes a first reinforcing plate 93. The first reinforcing plate 93 is located at the power-connecting pin 912 and is disposed between the housing 911 and the first connecting section 9511. It not only provides additional physical protection for the power-connecting pin 912 and its connection point, acting as a buffer and isolator, reducing the impact of external vibrations on the connection point, but also reduces the direct impact of external forces on the power-connecting pin 912, thereby extending the service life of the power-connecting pin 912 and related components.

[0055] More importantly, it significantly enhances the structural stability of the area. By being positioned between the housing 911 and the first connecting section 9511, the first reinforcing plate 93 acts as a robust support structure, ensuring that the electrical contact point between the power pin 912 and the first connecting section 9511 is more stable and reliable, effectively preventing loosening or even damage caused by minor vibrations or external forces during daily use.

[0056] It should be noted that the first reinforcing plate 93 will not completely cover the contact point between the first electrical connector 951 and the power-connecting pin 912. The first reinforcing plate 93 will leave an opening or notch in the electrical connection area, or leave enough space above / below the connection area so that the first electrical connector 951 can contact the power-connecting pin 912, and if a welding operation is performed, the solder can melt and flow smoothly to complete the welding process.

[0057] Furthermore, the end of the first electrical connector 951 near the housing 911 is a circular thin sheet. The portion of this sheet that is electrically connected to the power pin 912 is bonded with a first reinforcing plate 93. This portion can be the aforementioned first connecting segment 9511. Meanwhile, the remaining portion of this circular thin sheet end, which can be the aforementioned second connecting segment 9512, i.e., the area without the first reinforcing plate 93 bonded to it, is not fixed, thus maintaining a non-rigid connection between it and the speaker unit 91, allowing it to have relative freedom. This design gives the first electrical connector 951 a specific structural feature in the area near the speaker unit 91: one part is firmly fixed by the first reinforcing plate 93, while the other part can tilt or bend relative to the fixed part to a certain extent, facilitating its arrangement in the extending direction.

[0058] Please continue reading. Figure 4 , Figure 5 and Figure 6 In some embodiments, a protective adhesive 98 is applied to the connection between the first connecting segment 9511 and the power-connecting pin 912. The protective adhesive 98 is located on the side of the first connecting segment 9511 facing away from the first reinforcing plate 93. Although the solder joint between the power-connecting pin 912 and the first electrical connector 951 completes the electrical connection, this connection joint may be subjected to stress during daily use of the earphone 100 (such as bending, squeezing, and vibration). After the protective adhesive 98 cures, it firmly bonds the solder joint, the power-connecting pin 912, and the first connecting segment 9511 together, forming a whole. This greatly enhances the mechanical strength of the connection joint, preventing the solder joint from cracking or the pin from loosening due to vibration or stress, thereby improving the long-term reliability of the connection. Furthermore, the insulating layer formed after the protective adhesive 98 cures can prevent the solder joint or the power-connecting pin 912 from accidentally contacting other conductive parts, avoiding short-circuit faults.

[0059] When the speaker driver 91 is working, the internal diaphragm vibrates back and forth, causing changes in the air pressure inside the cavity. If the cavity were completely sealed, the accumulated air pressure would hinder the diaphragm's vibration, reducing its degree of freedom of movement and thus affecting sound quality. Therefore, the speaker driver's housing 911 is also equipped with a tuning port, which effectively balances the air pressure inside and outside the cavity. This design avoids the obstruction of diaphragm movement by air pressure buildup, allowing the diaphragm to vibrate more freely, thereby improving sound clarity and dynamic range.

[0060] like Figure 5 and Figure 6 As shown, corresponding to the tuning hole, the first electrical connector 951 is also provided with a clearance hole 951a corresponding to the tuning hole. The clearance hole 951a can be formed by the first connecting segment 9511 and / or the second connecting segment 9512. That is, the clearance hole 951a can be formed by the first connecting segment 9511 alone, or by the second connecting segment 9512 alone, or by the first connecting segment 9511 and the second connecting segment 9512 working together. The clearance hole 951a can avoid the position where the tuning hole is set, so that the first electrical connector 951 can be flexibly arranged near the tuning hole without affecting the function of the tuning hole.

[0061] like Figure 4 , Figure 7 , Figure 8 and Figure 9 As shown, in some embodiments, the headset 100 also includes a battery 90 electrically connected to the electronic control board 96. The battery 90 mainly provides power support to power all the electronic components within the headset 100, making the headset 100 an independent audio device that does not need to rely entirely on an external power source. The specific form of the battery 90 is not limited; for example, a rechargeable lithium battery 90 can be used.

[0062] Due to the limited internal space of the earphone 100, especially for small earphones 100, in this embodiment, part of the battery 90 is located in the mounting cavity 11a, and the other part extends into the sound outlet channel 12a. Furthermore, the central axis of the battery 90 is angled to the central axis of the speaker unit 91, allowing the battery 90 to more flexibly adapt to the limited and irregular space layout inside the earphone 100. In situations where the internal space of the earphone 100 is extremely limited, especially for designs aiming for miniaturization, this non-parallel layout can significantly improve space utilization. The battery 90 is no longer limited to being coaxial or parallel with the speaker unit 91, but can be tilted or deflected at a certain angle, thereby avoiding other key components or structures, making the overall structure more compact and avoiding assembly difficulties or performance degradation caused by mutual compression or interference between components.

[0063] The portion of the battery 90 extending into the sound outlet channel 12a is located on one side of the power connection pin 912, effectively utilizing the limited internal space of the headphone 100. Specifically, at least a portion of the structure of the battery 90 extending into the sound outlet channel 12a is located within the height range of the power connection pin 912. That is, at least a portion of the structure of the battery 90 extending into the sound outlet channel 12a (such as a side or edge of it) falls within the vertical height range occupied by the power connection pin 912 of the speaker unit 91. Furthermore, the portion of the battery 90 extending into the sound outlet channel 12a is located on the side of the first electrical connector 951 opposite to the housing 911. When designing the wiring path, the first electrical connector 951 can more effectively select the shortest or optimal path to connect from near the battery 90 to the target location requiring power supply or signal transmission. This allows for more efficient use of volume within a limited space, achieving a more compact internal structure. If the battery 90 is entirely housed in the sound outlet 12, the small size and limited length of the sound outlet 12 would result in an insufficient battery capacity, potentially limiting the battery life of the headphones 100 to basic usage needs. Conversely, if the battery 90 is entirely housed in the main housing 11, it would occupy more space, increasing the size of the main housing 11 and hindering the miniaturization design of the headphones 100.

[0064] By partially extending into the sound outlet channel 12a, the capacity of the battery 90 is ensured, guaranteeing sufficient battery life, while also preventing the battery 90 from completely occupying a large amount of space in the main housing 11. This allows the main housing 11 to be designed to be smaller, while also arranging the internal structure as compactly as possible within the limited space of the earcups 10.

[0065] like Figure 9 , Figure 10 and Figure 11 As shown, in some embodiments, the earphone 100 further includes a protective mesh 92 and a second electrical connector 952. The protective mesh 92 is connected to the sound outlet 12 and covers the sound outlet 12b. The protective mesh 92 can prevent foreign objects (such as dust and debris) from entering the ear shell 10 through the sound outlet 12b. The protective mesh 92 is electrically connected to the ground terminal of the electronic control board 96. The feedback microphone 80 is also mounted on the protective mesh 92, using the protective mesh 92 itself as a mounting base. Specifically, it can be fixed to the protective mesh 92 by laser welding, reducing the additional structures (such as independent brackets, long tubes, etc.) used to fix the microphone and guide the sound in traditional designs, thereby saving internal space. The second electrical connector 952 electrically connects the feedback microphone 80 and the electronic control board 96. The second electrical connector 952 is used to transmit the audio signal picked up by the feedback microphone 80 and transmit it from the feedback microphone 80 to the corresponding signal processing pin on the electronic control board 96.

[0066] Among them, the second electrical connector 952 is a flexible circuit board (FPC). The flexible circuit board has the characteristics of being bendable and foldable, which can adapt well to the complex and limited space inside the mouthpiece 12. The FPC can be easily bent or twisted to connect the feedback microphone 80 and the control board 96 in the shortest and most direct path. The wiring is carried out along the curved surface or internal structure of the ear shell 10, making the overall internal layout more compact and conducive to the miniaturization of the headphone 100.

[0067] Furthermore, the feedback microphone 80 can be directly mounted on a flexible circuit board using surface mount technology, making it suitable for mass production and offering high efficiency and high reliability.

[0068] This embodiment integrates multiple components (protective mesh 92, FB MIC, speaker unit 91) and places them directly inside the sound outlet 12. This concentrates these functional modules in a limited space, and the feedback microphone 80 is placed on the protective mesh 92, so that the two are compactly arranged inside the sound outlet 12. This helps to achieve miniaturization of the headphones 100, especially in the space-constrained area of ​​the sound outlet 12, where the microphone and protective structure required for noise reduction can be integrated more effectively without significantly increasing the overall size.

[0069] Because the feedback microphone 80 is located close to the sound outlet 12b, which is the point where the earphone 100 directly contacts the outside world and exchanges air and sound, it is also the part most susceptible to static electricity. When a user accidentally touches the sound outlet 12b with a static-charged finger or other object, the static electricity will directly affect the feedback microphone. The feedback microphone 80 is a miniature microphone, and its internal sensitive components (such as the diaphragm and amplification circuit) are very sensitive to static electricity. Even a small static shock can cause the feedback microphone 80 to degrade in performance or even fail completely.

[0070] Therefore, in this embodiment, the protective mesh 92 is electrically connected to the grounding terminal of the electronic control board 96. The protective mesh 92 can be made of metal or conductive material, which can effectively conduct electrostatic charges. That is, as a conductive material (such as a metal mesh or plating), the protective mesh 92 can collect electrostatic charges and conduct them to the grounding terminal of the electronic control board 96. This grounding design guides the electrostatic charge acting on the protective mesh 92 to a safe grounding terminal, thereby preventing electrostatic discharge from directly acting on or damaging the feedback microphone 80 located on the protective mesh 92, effectively preventing damage to the microphone device. This improves the anti-static performance of the headset 100 and the overall service life of the product.

[0071] Furthermore, once the protective mesh 92 is grounded, it forms an effective electromagnetic shielding layer, reducing interference from external electromagnetic waves to the internal circuitry. This is particularly important for the feedback microphone 80, as the microphone needs to accurately capture ambient noise, and electromagnetic interference can lead to a decrease in noise reduction performance.

[0072] Specifically, the protective mesh 92 is a protective steel mesh. This steel mesh possesses high strength and toughness, effectively preventing damage caused by vibration, external impact, or accidental collisions during daily use, ensuring its stability and durability over long-term use. Furthermore, the protective steel mesh has good conductivity, effectively conducting static electricity and reducing the direct impact of static electricity on the feedback microphone 80.

[0073] In this embodiment, the protective mesh 92 is grounded to the grounding terminal of the control board 96 via the second electrical connector 952. Static electricity first acts on the protective mesh 92, and the protective mesh 92 itself or its conductive parts become the initial contact point or induction point of the static electricity. The protective mesh 92 is connected to the control board 96 inside the earphone 100 via the pre-designed second electrical connector 952. The charge flows through the second electrical connector 952 and finally reaches the grounding terminal on the control board 96 (which typically contains critical circuits such as processing chips, power management, and amplifiers). The static electricity is effectively guided to a safe area, preventing the accumulation of static electricity to a level sufficient to damage the feedback microphone 80, which is extremely sensitive to static electricity, thereby protecting the feedback microphone 80 from electrostatic damage.

[0074] This avoids the need for additional connection paths or structures for grounding, saving space, especially in areas like the sound outlet 12 where space is often limited.

[0075] like Figure 6 and Figure 11 As shown above, the first electrical connector 951 serves to connect the speaker unit 91 to the main control board. Due to the limited internal space and complex structural layout of the earpiece 10, specifically, one end of the first electrical connector 951 is electrically connected to the power pin 912, and the other end extends towards the inner wall of the earpiece 10 and has double-sided pads. If the first electrical connector 951 were directly connected to the main control board, the wiring might be too long, occupying too much space. Therefore, the end of the first electrical connector 951 with double-sided pads is electrically connected to the second electrical connector 952, and then electrically connected to the control board 96 via the second electrical connector 952. The second electrical connector 952 is not only electrically connected to the feedback microphone 80, but also serves to electrically connect to the speaker unit 91, used to transmit the signal and power of the speaker unit 91. This achieves effective control over the wiring length of the first electrical connector 951, reducing the space occupied by the circuit wiring inside the earpiece 10. Meanwhile, the multifunctionality of the second electrical connector 952 (connecting both the speaker unit 91 and the feedback microphone 80) further optimizes the layout of the electrical connections inside the ear shell 10, thereby achieving effective integration of various electronic components and signal transmission within the limited space of the ear shell 10.

[0076] like Figure 4 , Figure 5 , Figure 6 and Figure 11 As shown, in some embodiments, the earphone 100 further includes a second reinforcing plate 94, which is disposed within the sound outlet channel 12a and connected to the protective net 92. The feedback microphone 80 is disposed on the second reinforcing plate 94, which provides additional support for the feedback microphone 80 and can effectively prevent the feedback microphone 80 from shifting or being damaged due to mechanical vibration or external force during the use of the earphone 100.

[0077] In practical applications, electrical connections are typically achieved through soldering. The second electrical connector 952 is a flexible circuit board. The flexible circuit board and the protective mesh (usually metal) expand and contract at different rates when temperatures change. This difference generates continuous mechanical stress at the solder joint. This can cause cracks to easily appear at the solder joint (solder point) during the soldering process or during use, a phenomenon known as "solder cracking." This solder cracking can compromise the stability of the electrical connection, affecting the performance and reliability of the earphone 100.

[0078] Therefore, in this embodiment, the second reinforcing plate 94 is electrically connected to the second electrical connector 952. The second reinforcing plate 94 supports the portion of the second electrical connector 952 where the feedback microphone 80 is located. The second reinforcing plate 94 can be made of a harder metal, providing stronger support than the protective mesh 92. During the welding process, the stress on the solder joint (solder point) is dispersed, reducing the risk of cracks caused by stress concentration. This ensures the stability of the entire internal structure of the sound outlet 12 during use and reduces damage caused by mechanical vibration or external forces.

[0079] Furthermore, the second reinforcing plate 94 is electrically connected to the second electrical connector 952 to ground the protective net 92 to the grounding terminal of the control board 96. In other words, the second reinforcing plate 94 not only provides mechanical support for the protective net 92 but also serves to conduct static electricity. Static electricity is generated and conducted to the protective net 92 of the earphone 100. Subsequently, the static electricity is conducted through the protective net 92 to the second reinforcing plate 94, and then from the second reinforcing plate 94 to the second electrical connector 952. Next, the second electrical connector 952 conducts the static electricity to the grounding terminal of the control board 96, and through the grounding terminal, the static electricity is discharged to the electrostatic discharge protection circuit on the control board 96.

[0080] like Figure 4 , Figure 5 , Figure 6 and Figure 11As shown, the feedback microphone 80 is further positioned on the side of the second reinforcing plate 94 facing the protective net 92. On the one hand, this makes full use of the space between the second reinforcing plate 94 and the protective net 92, avoiding structural conflicts or excessive space occupation due to improper positioning of the feedback microphone 80, and further optimizing the compact design of the earphone 100. On the other hand, positioning it on the side of the second reinforcing plate 94 facing the protective net 92 ensures that the feedback microphone 80 is closer to the sound source (such as the ear canal), thereby improving the accuracy and sensitivity of signal acquisition.

[0081] Specifically, the second reinforcing plate 94 is made of stainless steel. Stainless steel has excellent corrosion resistance, effectively resisting the erosion of sweat, moisture, and other corrosive substances during daily use, extending the service life of the second reinforcing plate 94, and ensuring its long-term stable performance in supporting and conducting electricity. Furthermore, stainless steel has good electrical conductivity, effectively conducting static electricity and quickly dissipating it, thus improving the electrostatic protection capability of the earphone 100.

[0082] Furthermore, the thickness of the stainless steel sheet can be 0.1cm-0.2cm. If the thickness is less than 0.1cm, the strength of the stainless steel sheet will decrease, making it prone to bending, deformation, or even damage during use. If the thickness is greater than 0.2cm, the weight and material cost of the stainless steel sheet will increase, and excessively thick stainless steel sheets are not conducive to the miniaturization and slimming design of the Headphone 100. A thickness between 0.1cm and 0.2cm is a balance point, ensuring sufficient strength and protective performance without causing processing, assembly, or cost problems due to excessive thickness or thinness.

[0083] like Figure 12 As shown, in some embodiments, a limiting groove 12c is provided on the inner wall of the sound outlet 12a near the sound outlet hole 12b. The limiting groove 12c is annular and provides a precise installation position. The protective net 92 is embedded in the limiting groove 12c and connected to the groove wall of the limiting groove 12c. Specifically, the protective net 92 can be connected to the groove wall of the limiting groove 12c by adhesive, so that the protective net 92 is firmly fixed to the sound outlet 12 and will not easily move, tilt or fall off. It also improves the ability of the protective net 92 to resist external impacts (such as accidental scratches by the user). Even if subjected to a certain external force, the protective net 92 is not easily damaged or deformed, improving the durability of the product.

[0084] like Figure 12 and Figure 13As shown, the protective net 92 further includes a protective portion 921 and a connecting portion 922. The protective portion 921 is mesh-shaped and covers the sound outlet 12b. Understandably, the mesh structure of the protective portion 921 allows sound to pass smoothly, ensuring that sound can be transmitted from the inside to the user's ear canal, while allowing the feedback microphone 80 to collect external sound. The connecting portion 922 is disposed around the edge of the protective portion 921. The connecting portion 922 extends from the connection point with the protective portion 921 toward the side opposite to the sound outlet 12b. The connecting portion 922 can be in the form of continuous and uniform serrations. This design not only increases the contact area between the connecting portion 922 and the groove wall of the limiting groove 12c, but also disperses stress through its unique shape, so that when the protective net 92 is subjected to external force or vibration, the stress can be evenly distributed, avoiding damage caused by local stress concentration. The connecting part 922 is connected to the circumferential direction of the protective part 921 and is connected to the groove wall of the limiting groove 12c. As described above, the protective net 92 is bonded to the groove wall of the limiting groove 12c through the connecting part 922, so that the protective net 92 can make multi-point and uniform contact and connection with the limiting groove 12c, and the fixation is more secure.

[0085] Specifically, the connecting part 922 includes a flange 9221 connected to the protective part 921. The flange 9221 is circumferentially disposed around the protective part 921 and extends toward the side opposite to the sound outlet 12b. The flange 9221 has a plurality of serrations evenly and spaced along its circumference. The serrated structure increases the contact area and friction between the flange 9221 and the groove wall of the limiting groove 12c. The serrated structure and the groove wall of the limiting groove 12c form a locking effect, which can more firmly lock it onto the groove wall and prevent the protective net 92 from loosening, falling off or rotating due to vibration, external force or slight displacement during use. Compared with the smooth flange 9221, the serrations provide a stronger locking force.

[0086] like Figure 6 , Figure 12 and Figure 13As shown, the protective net 92 also includes a support portion 923, which extends from the connecting portion 922 toward the main housing 11 within the sound outlet channel 12a. The end of the support portion 923 away from the connecting portion 922 bends toward the center of the centerline of the sound outlet hole 12b. A second reinforcing plate 94 is disposed on the support portion 923. Understandably, the second reinforcing plate 94 and the protective portion 921 are spaced apart along the axial direction of the sound outlet channel 12a. The portion connecting the support portion 923 and the second reinforcing plate 94 is parallel to the protective portion 921. Therefore, the support portion 923 as a whole resembles a structure that starts from the connecting portion 922, extends approximately axially, then bends inward (towards the center), and finally provides a plane parallel to the second reinforcing plate 94. This provides an ideal and stable attachment base for the second reinforcing plate 94. This parallel design ensures that the second reinforcing plate 94 can evenly distribute stress and work better with the support portion 923 and even the entire protective net 92, maximizing the reinforcement effect.

[0087] Specifically, the support portion 923 includes two support feet 9231 arranged radially opposite to each other along the protective portion 921. Correspondingly, the second reinforcing plate 94 includes a reinforcing portion 941 and two positioning portions 942. The reinforcing portion 941 is electrically connected to the electrical connector 95 and is supported on the feedback microphone 80. The two positioning portions 942 are respectively connected to both ends of the reinforcing portion 941 and extend to both sides to connect with the two support feet 9231. The relative arrangement of the two support feet 9231 and the two positioning portions 942 forms a stable support structure, which effectively prevents the second reinforcing plate 94 from shifting or tilting due to vibration or external force during use, and improves the stability of the internal structure of the sound outlet 12.

[0088] like Figure 6 , Figure 12 and Figure 13 As shown, to further improve the stability of the support 923, the sound outlet 12 is also provided with a fixing groove 12d on the inner wall of the sound outlet channel 12a, which connects to the limiting groove 12c. Part of the structure of the support 923 is inserted into the fixing groove 12d, which can improve the connection stability between the support 923 and the inner wall of the sound outlet 12, ensuring that the support 923 will not shift during installation, thereby ensuring the assembly accuracy of the entire component. Moreover, the fixing groove 12d provides a clear installation position for the support 923, which can reduce quality problems caused by improper assembly.

[0089] Following the above, corresponding to the two support feet 9231, two fixing slots 12d are also provided. The two fixing slots 12d are arranged radially opposite each other. If the protective net 92 attempts to rotate around the center of the sound outlet 12b, the portion of the support part 923 that is stuck in the fixing slot 12d will form an obstruction. Therefore, the protective net 92 cannot rotate freely within the limiting slot 12c, causing the protective net 92 to be stuck in a specific position in the limiting slot 12c.

[0090] Correspondingly, the protective net 92 is connected to the second reinforcing plate 94 through the support part 923. The second reinforcing plate 94 cannot rotate within the sound outlet channel 12a, and the electrical connector 95 connected to it can also remain relatively fixed, avoiding damage, breakage or performance degradation of the electrical connector 95 due to repeated twisting or accidental rotation, thus improving the reliability of the connection.

[0091] It should be noted that the fixing groove 12d has a guiding slope. The guiding slope is inclined in a direction away from the central axis of the sound outlet channel 12a and close to the sound outlet hole 12b. When the support part 923 needs to be inserted into the fixing groove 12d, the support part 923 first contacts the far end of the guiding slope. Since the slope is a guiding slope, the support part 923 can be "guided" or "pushed" along this slope to the deeper end of the fixing groove 12d. In this way, the support part 923 can slide in more easily and smoothly and finally be locked in the predetermined position of the fixing groove 12d.

[0092] like Figure 14 and Figure 15 As shown, the feedback microphone 80 may not be supported by the protective mesh 92. In some embodiments, the speaker unit 91 also includes a fixing bracket 913 connected to the speaker unit 91. The fixing bracket 913 is located on the sound output side of the speaker unit 91 and extends towards the sound output hole 12b. The feedback microphone 80 is mounted on the fixing bracket 913, making the position of the feedback microphone 80 very close to the sound source (speaker diaphragm). As mentioned earlier, being close to the sound output side of the speaker unit 91 helps to accurately pick up the speaker signal, optimize the active noise cancellation effect, and suppress feedback. Furthermore, integrating the feedback microphone 80 directly onto the speaker unit 91 improves the integration of the components. This is particularly advantageous for the design of the headphone 100, which pursues miniaturization and lightweight design, allowing for a more rational layout of various components within a limited space.

[0093] like Figure 16 , Figure 17 and Figure 18 As shown, specifically, the mounting bracket 913 includes at least two support frames 913A, which are symmetrically arranged on the speaker unit 91. For example, but not limited to, four, six, eight, etc., the support frames 913A can be arranged in pairs with intervals between them. The feedback microphone 80 is mounted on at least two support frames 913A, meaning the support frames 913A are located on different sides of the feedback microphone 80, used to cooperate in mounting the feedback microphone 80 on the sound output side of the speaker unit 91. This multi-point fixing, rather than single-point fixing, improves the installation stability of the feedback microphone 80. The space between every two support frames 913A can be used for the sound output from the speaker unit 91 to pass through.

[0094] Similar to the above-mentioned measures to prevent solder cracking of the first electrical connector 951, a second reinforcing plate 94 is also provided in this embodiment. The second reinforcing plate 94 is mounted on at least two support frames 913A. The second reinforcing plate 94 can be connected to the fixed bracket 913 by welding or bonding. The feedback microphone 80 is mounted on the second reinforcing plate 94. The second reinforcing plate 94 can provide additional support and fixing points for the first electrical connector 951.

[0095] Furthermore, the second reinforcing plate 94, the fixing bracket 913, and the outer shell 911 enclose a receiving space 12e, within which the feedback microphone 80 is located. In other words, the second reinforcing plate 94, the fixing bracket 913, and the outer shell 911 work together to restrict the displacement of the feedback microphone 80 in a specific direction. A portion of the first electrical connector 951 is positioned between the feedback microphone 80 and the second reinforcing plate 94, ensuring the electrical contact stability of the first electrical connector 951 and reducing changes in contact resistance or disconnections caused by physical displacement.

[0096] In some embodiments, the support frame 913A includes a connected support arm 9131 and a support portion 9132. The support arm 9131 is connected to the housing 911 and extends toward the sound outlet 12b. The support portion 9132 is formed by bending the end of the support frame 913A away from the speaker unit 91. The support portion 9132 has a positioning groove 9132a for supporting the second reinforcing plate. The two positioning portions 942 of the second reinforcing plate 94 can be respectively installed in the two positioning grooves 9132a, so that the second reinforcing plate 94 is mounted on the fixed bracket 913. Mounting the feedback microphone 80 on the reinforcing plate, rather than directly on the fixed bracket 913, can better distribute the weight of the feedback microphone 80 and the possible minor vibrations, preventing the fixed bracket 913 from deforming or being damaged due to long-term stress or vibration. The two fixed brackets 913 can more evenly distribute the weight of the reinforcing plate and the feedback microphone 80, improving the stability and deformation resistance of the overall structure.

[0097] The second reinforcing plate 94 also has a through hole 94a, specifically located on the reinforcing part. The through hole 94a extends along the thickness direction of the second reinforcing plate 94. Although the feedback microphone 80 itself is very sensitive, sound propagation requires a medium. The presence of the through hole 94a provides a more direct and low-resistance propagation path for sound pickup, ensuring that sound can reach the feedback microphone 80 more effectively, thereby improving the accuracy and sensitivity of pickup.

[0098] Furthermore, the aforementioned accommodating space is formed between the support portion 9132 and the speaker unit 91. The feedback microphone 80 is disposed on the side of the second reinforcing plate 94 facing the speaker unit 91 and is spaced apart from the speaker unit 91. This allows full utilization of the space between the two support arms 9131, making the structural arrangement inside the sound outlet 12 more compact and shortening the axial length of the sound outlet 12.

[0099] In other embodiments, the shape of the support portion 9132 is not limited to this. For example, the end of the support portion 9132 away from the support arm 9131 may also be flat.

[0100] like Figure 19 As shown, the support portion 9132 can be in the form of a strip plate to facilitate connection with the second reinforcing plate 94. In some embodiments, the width of the support portion 9132 can be 0.15mm-1.0mm, for example, 0.2mm, 0.5mm, 0.8mm, etc. In other embodiments, the width of the support portion 9132 can also be designed to other dimensions as needed. The support portion 9132 can also be designed to other shapes, such as cylindrical.

[0101] Furthermore, the mounting bracket 913 also includes a mounting ring 913B. Understandably, the mounting ring 913B is arranged in a ring shape, connected to the housing 911, and protrudes from the sound output side of the speaker unit 91. At least two support brackets 913A are connected to the mounting ring 913B. The mounting ring 913B can provide more stable and reliable support for the support brackets 913A, better transfer the force of the support brackets 913A to the robust housing 911, disperse stress, and reduce local pressure on the speaker unit 91 itself or its edges.

[0102] like Figure 14 and Figure 15As shown, in some embodiments, the first electrical connector 951 is a flexible circuit board. The first electrical connector 951 includes a first connecting segment 9511 and a third connecting segment 9513. The first connecting segment 9511 is attached to the housing 911 and electrically connected to the power-on pin 912. The third connecting segment 9513 includes a first extension 9514, a bending portion 9515, and a second extension 9516. The first extension 9514 is connected to the first connecting segment 9511 and partially extends outward from the outer side of the housing 911. One end of the bending portion 9515 is connected to the first extension 9514 and extends along the thickness direction of the housing 911. The bending portion 9515 is spaced apart from the speaker unit 91. The second extension 9516 is connected to the other end of the bending portion and electrically connected to the feedback microphone 80. This segmented and bending design allows the flexible circuit board to adapt more flexibly to the complex three-dimensional space inside the earphone 100. The first extension 9514 can extend to a specific location on the outside of the housing 911, the bending portion 9515 can change the orientation of the flexible circuit board, and the second extension 9516 can be precisely connected to the location of the feedback microphone 80. This makes it possible to achieve precise and reliable electrical connections within the compact structure of the headset 100.

[0103] In some embodiments, the speaker unit 91 is located on the side of the feedback microphone 80 facing the main housing 11. That is, the feedback microphone 80 is positioned closer to the sound outlet 12b than the speaker unit 91. If the feedback microphone 80 is far from the sound outlet 12b, the ambient noise it collects may have undergone more reflections and attenuation through the sound outlet channel 12a, and may not be the actual ambient noise closest to the ear canal entrance. In this embodiment, the feedback microphone 80 is positioned closer to the sound outlet 12b than the speaker unit 91. The feedback microphone 80 is closer to the ambient noise actually heard at the user's ear canal entrance, and the time difference between the sound collected by the speaker unit 91 (including the anti-phase sound wave) and the sound actually arriving at the ear canal entrance is smaller. This makes the sound signal (ambient noise + speaker unit 91 sound) collected by the feedback microphone 80 more correlated in time and phase with the sound that ultimately needs to be canceled at the ear canal entrance. Digital signal processors can then generate inverted sound waves based on this more "real" signal, and the time it takes for the sound waves to reach the entrance of the ear canal can be more precisely aligned with the ambient noise that needs to be canceled, thus achieving more accurate noise reduction.

[0104] Furthermore, the pickup port of the feedback microphone 80 is positioned facing the output side of the speaker unit 91. In an active noise cancellation (ANC) system, one of the main tasks of the feedback microphone 80 is to capture internal sounds near the entrance of the user's ear canal, including the sound emitted by the speaker unit 91 itself (whether it's playing music or the anti-phase sound waves used for noise cancellation). Since the pickup port of the feedback microphone 80 faces the output side of the speaker unit 91, it means that the feedback microphone 80 most directly and preferentially "hears" the sound directly transmitted from the speaker unit 91. This ensures that the feedback microphone 80 can most accurately capture the signal emitted by the speaker unit 91, especially the anti-phase sound waves used for noise cancellation, thus improving the accuracy and effectiveness of noise cancellation.

[0105] like Figure 4 , Figure 6 and Figure 12 As shown, in some embodiments, the speaker unit 91 and the feedback microphone 80 are basically coaxially arranged. That is, the sound wave propagation direction and physical installation position of the speaker unit 91 and the feedback microphone 80 are roughly on the same axis, which enables the feedback microphone 80 to accurately capture the sound signal generated by the speaker unit 91, thereby achieving more accurate phase compensation in the active noise cancellation system and improving the noise reduction effect, especially in the cancellation of high-frequency noise.

[0106] Furthermore, along the axial direction of the sound outlet channel 12a, the protective part 921, the feedback microphone 80, and the speaker unit 91 are arranged sequentially and coaxially. This coaxial arrangement makes the protective mesh 92, the speaker unit 91, and the feedback microphone 80 more compact in space, reducing redundant structures. This design significantly saves internal space and provides more possibilities for the layout of other electronic components (such as electrical connectors 95, the first reinforcing plate 93, the second reinforcing plate 94, etc.).

[0107] like Figure 7 and Figure 8 As shown, in some embodiments, the headphones 100 also include a feed-forward microphone 70 (FF MIC), which is primarily responsible for predicting and picking up external ambient noise. The ambient noise signal it collects is sent to a processor, which generates an inverted sound wave, which is then played back by the headphones 100 to cancel out the noise. Its noise reduction process focuses more on prediction and active intervention. Many people wear headphones 100 while sleeping to isolate themselves from ambient noise, such as the hum of an air conditioner or street noise at night, in order to fall asleep faster or achieve deeper sleep. Therefore, good noise reduction is a core requirement for sleep headphones 100.

[0108] In related technologies, for the active noise cancellation requirements of in-ear sleep headphones 100, a feedforward microphone 70 is typically placed within the headphone 100 housing structure. To achieve sound pickup, the feedforward microphone 70 is equipped with a pickup hole 112A2. A common existing layout places this pickup hole 112A2 on the outer surface area facing away from the user's ear when the headphone 100 is worn. When the user is in a side-lying sleeping position, this outer surface area facing away from the ear will be in close contact with bedding such as pillows and mattresses. Because the pickup hole 112A2 of the feedforward microphone 70 is located in this area, it is easily blocked or completely sealed by such bedding. The blocking or sealing of the pickup hole 112A2 directly prevents the feedforward microphone 70 from effectively collecting ambient noise signals, thus rendering the active noise cancellation function based on these signals ineffective.

[0109] like Figure 1 and Figure 7 As shown, to solve the above problems, in this embodiment, the main housing 11 includes a main body portion 111A and a protrusion 112A. The main body portion 111A is the main part of the main housing 11, constituting the main outline and volume of the earphone 100, providing basic shape and structural support for the entire earphone 100, and accommodating the necessary internal components. The main body portion 111A has a flat structure, which is key to achieving the overall thinness of the earphone 100. It helps to reduce the thickness of the earphone 100 in the direction perpendicular to the auricle, thereby reducing the pressure on the ear and surrounding area when wearing it, especially when sleeping on one's side, and improving wearing comfort.

[0110] The protrusion 112A protrudes from one side of the main body 111A. Specifically, the protrusion 112A is configured to be located on the outside of the user's helix when the earphone 100 is worn by the user, and extends towards the user's antihelix. This avoids increasing the thickness of the main shell 11, and the main body 111A can maintain a relatively thin design. The protrusion 112A located on the side will not generate direct and large-area pressure in the main force direction of lying on the side, thereby effectively avoiding the obvious discomfort caused by the excessive thickness of the shell of the traditional earphone 100 when lying on the side, and improving the user's wearing experience in the lying position (especially the side-lying position).

[0111] It should be noted that the main body 111A and the protrusion 112A together form a continuous integral structure, jointly constructing the mounting cavity 11a. In other words, the protrusion 112A is not a separate component independent of the main body 111A. Through this integrated structural design, the ear shell 10 is divided into functionally distinct but structurally continuous regions.

[0112] Furthermore, the outer edge of the protrusion 112A smoothly transitions to the outer edge of the main body 111A, and the earphone shell 911 from the main body 111A to the protrusion 112A has no sharp edges or abrupt steps. When the earphone 100 is worn on the ear, especially when the user is lying on their side, this smooth edge can better conform to the skin, reducing pressure and friction on the auricle, helix, or surrounding skin. The smooth transition also allows the entire ear shell 10 to form a more continuous and streamlined contour. This design helps the earphone 100 fit more closely and naturally to the complex curves of the ear, especially in the area on the outer side of the helix.

[0113] In this configuration, the feedforward microphone 70 is at least partially located within the protrusion 112A. Understandably, "at least partially" includes two scenarios: first, the entire feedforward microphone 70 is completely and entirely housed within the protrusion 112A; second, the feedforward microphone 70 is not entirely located within the protrusion 112A, but rather a portion is located within the main body 111A, while another portion extends and is located within the protrusion 112A.

[0114] Since there is still a certain space between the main body 111A and the sound outlet 12 and the antihelix when the earphone is worn, the protrusion 112A is set in this area. This allows for a suitable mounting position for the feedforward microphone 70 without significantly increasing the overall size of the earphone 100 or changing its basic wearing method (such as in-ear). This means that the protrusion 112A forms a local "raise" or "step" relative to the main body 111A in the direction towards the antihelix, thus creating a height difference. The surface of the protrusion 112A facing the sound outlet 12 is provided with a pickup hole 112A2 corresponding to the feedforward microphone 70. In other words, the pickup hole 112A2 is located on the side away from the pressure area when the earphone 100 is worn and the user is lying on their side. This avoids the area directly subjected to pressure, allowing the feedforward microphone to maintain an unobstructed acoustic path to the external environment. Even in the sleeping position of lying on one's side, the pickup hole 112A2 is not easily blocked. The feedforward microphone 70 can continuously and effectively pick up environmental noise signals through the pickup hole 112A2.

[0115] Furthermore, the central axis of the pickup hole 112A2 is set at an angle to the central axis of the main body 111A and extends outward from the main body 111A. Since the feedforward microphone 70 is usually used to pick up ambient sound or conversation, the tilted pickup hole 112A2 can adjust the microphone's main pickup direction, making it more inclined to capture sound from a specific direction (such as the front or the outside). Moreover, the internal structure of the earphone 100 (such as the cavity and the sound outlet 12) may generate resonance or reflected sound. The tilted pickup hole 112A2 can prevent the microphone from directly receiving these internal sound waves, thereby reducing the impact of resonance on the pickup quality.

[0116] like Figure 1 , Figure 7 and Figure 8 As shown, the mounting cavity 11a includes a first mounting cavity 111A1 and a second mounting cavity 112A1 that are connected to each other. The first mounting cavity 111A1 is disposed within the main body 111A, and the second mounting cavity 112A1 is disposed within the protrusion 112A. Understandably, the pickup hole 112A2 communicates with the second mounting cavity 112A1. The electronic control board 96 is flat, with part of it located within the first mounting cavity 111A1 and the other part extending into the second mounting cavity 112A1, allowing the electronic control board 96 to better adapt to the internal spatial layout of the earphone 100. This design fully utilizes the space of the main body 111A and the protrusion 112A, achieving a compact design for the earphone 100. This allows the earphone 100 to accommodate the necessary electronic components and meet functional requirements while maintaining a small size. The feedforward microphone 70 is mounted on the electronic control board 96, which can shorten the signal transmission path, reduce signal interference during transmission, help improve signal integrity and quality, and ensure that the feedforward microphone 70 can more accurately capture external ambient noise. Furthermore, since the feedforward microphone 70 is closer to the signal processing unit on the electronic control board 96, the signal processing delay can be significantly reduced, which is particularly important for the real-time noise reduction function and can improve the immediacy and accuracy of the noise reduction effect.

[0117] Since the main body 111A and the protrusion 112A are not two independent parts, but rather a continuous and smoothly transitioning whole, a boss structure with a certain thickness is naturally formed in the area where the main body 111A extends and connects to the protrusion 112A. The inner wall of the boss structure forms part of the second mounting cavity 112A1. The boss structure can provide support for the electronic control board 96, and the feedforward microphone 70 is correspondingly installed on the part of the electronic control board 96 supported by the boss structure.

[0118] Furthermore, mounting the feedforward microphone 70 on the control board 96 provides a more stable fixation, reducing the shaking of the feedforward microphone 70 inside the headset 100 and improving its durability and reliability. During the assembly of the headset 100, it also reduces assembly steps and connection points, lowering the possibility of assembly errors and improving production efficiency.

[0119] like Figure 8 and Figure 9 As shown, the headphones 100 also include ear wings 20, which wrap around a portion of the outer surface of the main body 111A. The ear wings 20 are typically made of soft materials, such as silicone or rubber, to reduce pressure on the ears and improve wearing comfort.

[0120] The ear wing 20 includes a connecting retaining sleeve 21 and a supporting portion 22. The retaining sleeve 21 covers the portion of the main body 111A located within the user's concha when the earphone 100 is worn, serving to secure the main body 111A. This design ensures that the earphone 100 will not easily slip or fall off during wear, especially during activities such as exercise or sleeping on its side. The supporting portion 22 is spaced apart from the protrusion 112A along the thickness direction of the main body 111A. The supporting portion 22 is configured to elastically abut against the user's antihelix when the earphone 100 is worn. Through contact with the antihelix, it provides an additional support point for the earphone 100, further enhancing the wearing stability of the earphone 100. The elastic design of the supporting portion 22 can adapt to different user ear shapes, reduce pressure on the antihelix, and improve wearing comfort. At the same time, the elasticity of the supporting portion 22 can automatically adjust the contact force with the antihelix, ensuring stable wearing in various activity scenarios.

[0121] Furthermore, when the earphone 100 is worn, the supporting part 22 is located inside the protrusion 112A, and the supporting part 22 and the protrusion 112A are arranged at intervals, which can make full use of the space on both sides of the thickness direction of the main body 111A, making the layout of the earphone 100 more compact and the overall size of the earphone 100 smaller. The pickup hole 112A2 is located on the side of the protrusion 112A facing the supporting part 22. That is to say, when the supporting part 22 abuts against the user's antihelix, there is a certain gap between the supporting part 22 and the protrusion 112A. This design ensures that even when sleeping on one's side, pillows or other bedding will not directly compress the pickup hole 112A2, thus preventing the pickup hole 112A2 from being blocked.

[0122] The first mounting cavity 111A1 is directly connected to the sound outlet channel 12a, while the second mounting cavity 112A1 is connected to the sound outlet channel 12a through the first mounting cavity 111A1. The surface of the protrusion 112A facing the sound outlet 12 is also provided with a rear cavity tuning hole 112A3 that connects to the second mounting cavity 112A1. Understandably, the rear cavity tuning hole 112A3 connects to the external air and the rear cavity of the speaker unit 91, adjusting the air pressure on the back of the vibration system and controlling the degree of acoustic coupling between the rear cavity and the external air. This is like providing an "outlet" or "pressure relief valve" for the sound waves on the back of the vibration system, thereby changing the pressure and acoustic load acting on the back of the diaphragm.

[0123] Furthermore, the rear cavity tuning hole 112A3 and the pickup hole 112A2 are arranged adjacent to each other on the same side of the protrusion 112A. This means that when the user is lying on their side while wearing the device, the placement of the rear cavity tuning hole 112A3 on the protrusion 112A reduces the likelihood of it becoming blocked. If the rear cavity tuning hole 112A3 is blocked, the pressure on the back of the vibration system cannot be properly released and regulated, disrupting the originally designed acoustic balance. This may lead to a deterioration in low-frequency response. Additionally, the rear cavity tuning hole 112A3 shares a relatively fixed acoustic environment with the pickup hole 112A2 to improve the stability of sound pickup and tuning.

[0124] Furthermore, along the thickness direction of the main body 111A, the orthographic projection of the rear cavity tuning hole 112A3 is located outside the orthographic projection of the supporting part 22, which maximizes the unobstructed flow of the rear cavity tuning hole 112A3 and prevents it from being blocked. This reduces the risk of the rear cavity tuning hole 112A3 being blocked during wear, and regardless of how the user adjusts the wearing posture, the rear cavity tuning hole 112A3 maintains as much communication with the outside air as possible.

[0125] like Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, in some embodiments, the earphone 100 includes a charging unit 40, which works in conjunction with a battery 90. To ensure the battery's battery life, the battery 90 is relatively large. The main part of the large battery 90 is placed in a first mounting cavity 111A1 with a large space. Part of the battery 90 extends into the sound outlet channel 12a. The battery 90 is electrically connected to the electronic control board 96 and can provide power to the electronic control board 96. The battery 90 and the electronic control board 96 are arranged along the thickness direction of the main body 111A. The battery 90 has battery 90 pins that extend towards the electronic control board 96 and are inserted into the electronic control board 96 to provide power to the electronic control board 96. The charging unit 40 is located around the battery 90 and can be electrically connected to the battery 90 through the electronic control board 96. The charging unit 40 is used to charge the battery 90 and is an interface or sensing device responsible for charging the battery 90. It can be a physical contact (such as a USB Type-C interface, Lightning interface, or dedicated wireless charging contact) or a wireless charging coil. Its function is to receive external power (usually from the charging case or a direct connection to the charging cable) and safely and efficiently transfer electrical energy to the battery 90 for storage. It is key to the earphones 100's ability to be used repeatedly and maintain continuous battery life.

[0126] like Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, in this embodiment, the charging unit 40 is a wireless charging contact, and the earphone 100 also includes a magnet 50. The charging unit 40 and the magnet 50 are disposed adjacent to each other in the first mounting cavity 111A1 and exposed on the outer surface of the main body 111A. When the earphone 100 needs to be placed in the charging case for charging, the charging case is usually also provided with a corresponding magnet 50. The magnet 50 on the earphone 100 and the magnet 50 in the charging case attract each other, which can automatically attract the earphone 100 to the designated charging position in the charging case. This magnetic cooperation ensures that the charging unit 40 of the earphone 100 can accurately and quickly align with the charging contact or wireless charging coil in the charging case every time, ensuring the reliability of charging and avoiding the difficulty of manual alignment by the user.

[0127] Furthermore, since the charging part 40 and the magnet 50 are located on the periphery of the main body 111A, the skin around the user's ear and the pillow exert pressure on the ear shell 10. If the charging part 40 (usually a metal contact) or the magnet 50 (even a small magnet 50) were located in the pressure area, their hard surfaces could directly press against the skin, causing discomfort or even pain. This design places them on the periphery of the main body 111A, away from the main pressure area, so that when sleeping on one's side, the user's ear primarily contacts the soft ear wing 20, rather than the hard charging contacts or magnet 50. This significantly reduces pressure and discomfort when sleeping on one's side, greatly improving wearing comfort.

[0128] Furthermore, the charging unit 40 and the magnet 50 are respectively disposed on opposite sides of the protrusion 112A. By placing the charging-related components (charging unit 40 and magnet 50) on the opposite side, their potential impact on the internal acoustic environment of the protrusion 112A can be reduced. For example, the charging contacts or the magnet 50 may generate minor electromagnetic interference or physical obstruction; their separate placement helps to ensure the purity and accuracy of the sound pickup by the feedforward microphone 70.

[0129] like Figure 8 and Figure 9 As shown, in some embodiments, the main housing 11 includes a front housing 111B and a rear housing 112B that are connected to each other, dividing the main housing 11 into two separable and independently moldable parts, which are then connected by a cover (such as clips, screws, or adhesive) to achieve a good seal. Internal structures (such as an electronic control board 96, a battery 90, etc.) can be installed within the cavity formed by the front housing 111B and the rear housing 112B.

[0130] The rear shell 112B has a flat, cap-like structure, and its main function is to seal the rear of the front shell 111B, thus protecting the delicate electronic components and acoustic structures inside together with the front shell 111B. The front shell 111B is the main part that forms the first mounting cavity 111A1 and the second mounting cavity 112A1, and can house the electronic components and acoustic structures inside the front shell 111B.

[0131] The sound outlet 12 and the rear shell 112B are respectively connected to opposite sides of the front shell 111B along the thickness direction. The sound outlet 12 can be integrally formed with the front shell 111B, reducing connection points and improving structural stability. Furthermore, the front shell 111B and the rear shell 112B together form the main body 111A and the protrusion 112A, ensuring the integrity of the headphone 100's shape and structural stability. The protrusion 112A and the main body 111A are a single unit, making them less prone to deformation or damage during use.

[0132] Please continue reading. Figure 8 and Figure 9 The front shell 111B includes a front shell ventral surface 111B1 and a front shell side surface 111B2, which are different parts of the outer surface of the front shell 111B. The front shell ventral surface 111B1 is connected to the outer surface of the sound outlet 12, and the front shell side surface 111B2 is connected to the outer surface of the rear shell 112B. The front shell side surface 111B2 extends from the end of the front shell ventral surface 111B1 away from the sound outlet 12 and is bent relative to the front shell ventral surface 111B1. The charging unit 40 and the magnet 50 are both located on the front shell side surface 111B2.

[0133] When the earphone 100 is worn by a user, the surface of the front shell 111B that contacts the ear is mainly the ventral side 111B1. The side surface 111B2 of the front shell, being bent relative to the ventral side 111B1, is less likely to contact the ear. It is understandable that the charging part 40 and the magnet 50 are typically rigid structural components, which can easily cause discomfort to the user when the ear is compressed. This embodiment of the application, by placing the charging part 40 and the magnet 50 on the side surface 111B2 of the front shell, prevents the charging part 40 and the magnet 50 from contacting the ear when the earphone 100 is worn, thus improving the wearing comfort of the earphone 100.

[0134] The ear wing 20 can cover the underside 111B1 and side surface 111B2 of the front shell, and has exposure holes in the areas corresponding to the charging part 40 and the magnet 50, so that the charging part 40 and the magnet 50 can be exposed to the outside through the exposure holes, so that the earphone 100 can cooperate with the charging case when placed in the charging case. The part of the front shell side surface 111B2 where the charging part 40 and the magnet 50 are located protrudes outward, and correspondingly, the charging position of the charging case is also recessed to a certain depth. The protruding charging part 40 on the front shell side surface 111B2 can better match with the corresponding part of the charging case, forming a more stable connection and reducing poor contact caused by shaking.

[0135] Optionally, the front shell side surface 111B2 may be provided with a snap-fit ​​groove 111B3 for snapping the ear wing 20, thereby achieving a stable installation of the ear wing 20 on the front shell 111B. The snap-fit ​​groove 111B3 may be, but is not limited to, an annular groove, and the ear wing 20 may be sleeved on the front shell 111B and snapped into the snap-fit ​​groove 111B3. The snap-fit ​​groove 111B3 may be located at one end of the front shell side surface 111B2 near the rear side to facilitate the installation of the ear wing 20. In other embodiments, the snap-fit ​​groove 111B3 may also be located at other positions on the front shell side surface 111B2.

[0136] like Figure 8 As shown, the headset 100 also includes an antenna 60, which is a component used by the headset 100 to achieve wireless communication. Under the control of the electronic control board 96, it can communicate with the outside world via electromagnetic waves. The headset 100 can transmit signals to the outside world through the antenna 60. When an external device (such as a mobile phone) detects the signal and successfully pairs with it, the headset 100 can establish a wireless connection with the external device, and then transmit data, such as audio data, with the external device.

[0137] The control board 96 is provided with a contact 961 for electrical connection with the antenna 60. Correspondingly, the rear shell 112B is provided with a microhole communicating with the second mounting cavity 112A1. The antenna 60 can be connected to the contact 961 through the microhole. The contact 961 is located inside the second mounting cavity 112A1. The control board 96 is stably supported on the cavity wall of the second mounting cavity 112A1, which ensures the stability of the spatial position and orientation of the contact 961 on the circuit board. The connection position between the antenna 60 and the contact 961 is more fixed and precise, reducing poor contact or signal fluctuations that may be caused by shaking or vibration, thereby improving the long-term reliability of the electrical connection.

[0138] The antenna 60 is disposed on the surface of the rear shell 112B facing away from the sound outlet 12. Compared to related technologies where the antenna 60 is mounted in the first mounting cavity 111A1 or the second mounting cavity 112A1, this embodiment places the antenna 60 on the outer surface of the rear shell 112B. This reduces the shielding or reflection of wireless signals by internal metal components, plastic cavities, or vibration systems, thereby improving the performance of the antenna 60. Sufficient vertical space exists between the antenna 60 and other components, preventing signal attenuation or damage caused by components being too close together. The antenna 60, mounted on the outer surface of the rear shell 112B, does not occupy internal space in the earpiece 10, which also facilitates the miniaturization design of the earphone 100.

[0139] Furthermore, when the earphone 100 is worn by the user, the antenna 60 will not come into contact with the user's ear, reducing the pressure on the ear in the side-sleeping scenario, and also preventing the skin of the ear from absorbing the antenna 60 waves, which is beneficial to improving radio frequency performance.

[0140] Among them, antenna 60 can be an LDS antenna. LDS antenna technology, short for Laser-Direct-structuring, is a technology that uses a laser to directly form circuit patterns on a housing. This technology uses computer-controlled laser movement to project the laser onto the housing, which can quickly activate the circuit pattern, thereby depositing a metal antenna on the surface of the housing.

[0141] In other embodiments, the antenna 60 of the earphone 100 is not limited to the above design. For example, the antenna 60 can be an FPC antenna, a PCB antenna, a spring antenna, a ceramic patch antenna, etc.

[0142] While the antenna 60 possesses a certain degree of durability, it can still be damaged due to accidental drops, friction, or scratches from other hard objects. To address this issue, in some embodiments, a flexible material layer is provided on the outer wall of the rear shell 112B. This flexible material layer covers the antenna 60 and absorbs and cushions external impacts and friction, protecting the antenna 60 from scratches, abrasions, or impacts. Furthermore, the flexible material layer typically offers a better tactile feel, being softer and warmer, significantly improving the comfort of wearing the headphones and reducing the sensation of foreign objects in the ear.

[0143] Specifically, the flexible material layer can be a silicone layer, a thermoplastic polyurethane layer, or a rubber layer, providing a soft touch.

[0144] like Figure 12 As shown, in some embodiments, the earphone 100 further includes a mesh fabric 97, which is connected to the inner side of the protective net 92 and covers the perforated holes 92a on the protective net 92. The size and dimensions of the protective net 92 are adapted to the mesh fabric 97, and the protective net 92 is covered on the side close to the feedback microphone 80. Understandably, the main function of the mesh fabric 97 is to further block dust and fine particles from entering the earphone 100, protect the internal feedback microphone 80 and speaker unit 91, reduce the risk of failure caused by dust accumulation or foreign object entry, and extend the service life of the earphone 100.

[0145] Understandably, the perforations 92a of the protective mesh 92 are larger than the mesh openings of the mesh fabric 97. The main function of the protective mesh 92 is to prevent larger foreign objects from entering the earphone 100, and it also has a certain mechanical strength to withstand a certain amount of external impact. The mesh fabric 97, on the other hand, has several smaller mesh openings, providing more detailed protection. The combination of the protective mesh 92 and the mesh fabric 97 provides multi-layered protection, ensuring that the internal components of the earphone 100 are adequately protected in various usage scenarios. The protective mesh 92 blocks larger foreign objects and liquids, while the mesh fabric 97 further blocks dust and fine particles. This multi-layered protection design can effectively reduce the risk of malfunctions caused by the entry of dust and foreign objects.

[0146] Among them, the mesh fabric 97 can be non-woven fabric, nylon mesh or polyester fiber mesh, which has good breathability and dustproof effect, while allowing sound to pass through.

[0147] Furthermore, the protective net 92 and the flexible circuit board encapsulating the feedback microphone 80 are modularly processed, that is, uniformly processed and assembled. The three are integrated in the early stage of manufacturing, so that they do not need to be installed one by one when assembling the headphone 100. This reduces the complexity and time of subsequent assembly and simplifies the subsequent assembly process.

[0148] like Figure 7 and Figure 8 As shown, in some embodiments, the earphone 100 further includes an ear cap 30, which is fitted onto the sound outlet 12. The ear cap 30 has a speaker hole 30b that is opposite to the sound outlet hole 12b. The sound outlet 12 has an annular protrusion 121, and the ear cap 30 has an annular recess 31 corresponding to the annular protrusion 121. The ear cap 30 is secured to the sound outlet 12 by the cooperation of the annular protrusion 121 and the annular recess 31, which can effectively fix the ear cap 30 to the sound outlet 12 and prevent the ear cap 30 from accidentally falling off or shifting during use (such as during exercise or head shaking).

[0149] The ear tips 30 are typically made of soft materials such as silicone. The soft ear tips 30 provide a more comfortable wearing experience and reduce direct irritation to the ear canal. Different sizes of ear tips 30 can adapt to different users' ear canal sizes, further improving comfort and fit.

[0150] When the earphone 100 is worn in a person's ear, the ear cap 30 fits tightly in the ear, creating a pressure difference between the inside and outside of the ear. This pressure difference may impact the eardrum, causing discomfort. Furthermore, the pressure may also impact the components inside the sound outlet 12, potentially causing damage, such as deformation of the diaphragm of the speaker unit 91, which could negatively affect the sound quality of the earphone 100.

[0151] To address the aforementioned issues, the inner wall of the ear cap 30 has a pressure relief groove 30a, and the outer walls of the sound outlet 12 and the main body 111A have a pressure relief channel 10a communicating with the pressure relief groove 30a. The pressure relief channel 10a extends axially along the sound outlet 12 and passes through the annular protrusion 121, extending to the portion of the front shell side 111B2 where the charging part 40 is located. Understandably, the pressure relief channel 10a communicates with the outside. Understandably, when there is a difference in air pressure between the inside and outside, the air in the ear canal can enter the pressure relief groove 30a through the sound hole 30b and begin to flow outward, communicating with the outside along the pressure relief channel 10a on the sound outlet 12 and the main body 111A, thereby reducing wearing fatigue or discomfort caused by air pressure issues.

[0152] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0153] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0154] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0155] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0156] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An earphone, characterized in that, include: The ear shell includes a main shell and a sound outlet connected to the main shell. The main shell is provided with a mounting cavity, and the sound outlet is provided with a sound outlet channel communicating with the mounting cavity and a sound outlet hole communicating with the sound outlet channel. The control board is located inside the mounting cavity; A loudspeaker unit is disposed within the sound output channel; the loudspeaker unit includes a housing and power pins exposed in the housing; A feedback microphone is disposed within the sound output channel, the feedback microphone being arranged along the axial direction of the sound output channel on the sound output side of the speaker unit, and spaced apart from the speaker unit; and The first electrical connector connects the power-on pin to the electronic control board.

2. The headphones as described in claim 1, characterized in that, The first electrical connector is a flexible circuit board. The first electrical connector includes a first connecting segment and a second connecting segment connected to each other. The first connecting segment is attached to the housing and electrically connected to the power-on pin. The second connecting segment is separately disposed from the housing and extends from the first connecting segment toward the electrical control board.

3. The headphones as described in claim 2, characterized in that, It also includes the first reinforcing plate; The first reinforcing plate is located between the first connecting section and the outer shell.

4. The headphones as described in claim 2, characterized in that, The outer casing is also provided with a tuning hole, and the first connecting segment and / or the second connecting segment form a clearance hole corresponding to the tuning hole.

5. The headphones as described in claim 1, characterized in that, It also includes a battery electrically connected to the electronic control board; The battery portion is located inside the mounting cavity, while the other portion extends into the sound outlet channel. The central axis of the battery is set at an angle to the central axis of the speaker unit.

6. The headphones as described in claim 5, characterized in that, The portion of the battery extending into the sound outlet channel is located on one side of the power connection pin and on the side of the first electrical connector away from the speaker unit.

7. The headphones as described in any one of claims 1 to 6, characterized in that, Also includes: The second electrical connector connects the feedback microphone and the electronic control board.

8. The headphones as described in claim 7, characterized in that, The second electrical connector is a flexible circuit board. The first electrical connector is electrically connected to the second electrical connector and is electrically connected to the electronic control board via the second electrical connector.

9. The headphones as described in any one of claims 1 to 6, characterized in that, It also includes a mounting bracket, which is connected to the sound output side of the speaker unit, and the feedback microphone is mounted on the mounting bracket.

10. The headphones as described in claim 9, characterized in that, The fixed bracket includes at least two support frames, which are symmetrically arranged on the speaker unit, and the feedback microphone is mounted on at least two of the support frames.

11. The headphones as claimed in claim 10, characterized in that, It also includes a second reinforcing plate, which is mounted on at least two of the support frames. The feedback microphone is mounted on the second reinforcing plate, and a portion of the first electrical connector is disposed between the feedback microphone and the second reinforcing plate.

12. The headphones as claimed in claim 11, characterized in that, The support frame is bent at one end away from the speaker unit to form a support portion, and an accommodating space is formed between the support portion and the speaker unit. The feedback microphone is located in the accommodating space and is spaced apart from the speaker unit.

13. The headphones as described in claim 12, characterized in that, The supporting part is provided with a positioning groove, and the second reinforcing plate is provided with a positioning part. The positioning part is installed in the positioning groove, and the second reinforcing plate is also provided with a through hole.

14. The headphones as claimed in claim 10, characterized in that, The fixed bracket further includes a fixing ring, which is connected to the housing and protrudes from the sound output side of the speaker unit. The at least two support frames are connected to the fixing ring.

15. The headphones as described in claim 9, characterized in that, The first electrical connector is a flexible circuit board, comprising a first connecting segment and a third connecting segment. The first connecting segment is attached to the housing and electrically connected to the power-on pin. The third connecting segment includes: The first extension is connected to the first connecting segment; A bent portion, one end of which is connected to the first extension portion and extends along the thickness direction of the outer casing; the bent portion is spaced apart from the speaker unit; and The second extension is connected to the other end of the bent portion and is electrically connected to the feedback microphone.

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