headphones

Abstract

One set of headphones (100), comprising: - an ear housing (10) comprising a main housing (11) and a sound outlet connected to the main housing (11), wherein the main housing (11) has a mounting space (11a), the sound outlet has a sound output channel (12a) connected to the mounting space (11a) and a sound outlet opening connected to the sound output channel (12a); - an electrical control board (96) located in the assembly space (11a); - a loudspeaker unit (91) arranged in the sound output channel (12a), the loudspeaker unit (91) comprising a housing (911) and a power connection pin extending from the housing (911); - a feedback microphone (80) arranged in the sound output channel (12a), wherein the feedback microphone (80) is arranged along an axial direction of the sound output channel (12a) on a sound emission side of the loudspeaker unit (91) and spaced apart from the loudspeaker unit (91); and - a first electrical connecting element that electrically connects the power connection pin to the electrical control board (96).

Description

Technical field

[0001] The present invention relates to the technical field of headphones, specifically a pair of headphones. State of the art

[0002] In the prior art, the structure of in-ear headphones typically houses the loudspeaker in a cavity within the main housing, and a sound outlet tube is arranged. The sound outlet tube is covered with an earplug. The sound produced by the loudspeaker propagates through the sound outlet tube to the opening of the user's ear canal, while the earplug serves to hold and seal the headphone at the opening of the user's ear canal. However, such a structural design results in a relatively large volume for the in-ear headphone, which is detrimental to the user's wearing comfort. In particular, in application scenarios where the user sleeps, a larger volume of headphone can be difficult to adjust to the user's side-sleeping position. Summary

[0003] A headphone according to claim 1 is provided with the aim of reducing the volume of an in-ear headphone.

[0004] According to one aspect, a headphone comprises an ear housing, which includes a main housing and a sound outlet connected to the main housing, wherein the main housing has a mounting space, the sound outlet has a sound output channel connected to the mounting space and a sound outlet opening connected to the sound output channel; an electrical control board arranged in the mounting space; a loudspeaker unit arranged in the sound output channel, wherein the loudspeaker unit comprises a housing and a power connection pin (or multiple power connection pins) extending from the housing; a feedback microphone arranged in the sound output channel, wherein the feedback microphone is arranged along an axial direction of the sound output channel on a sound emission side of the loudspeaker unit and spaced apart from the loudspeaker unit;and a first electrical connecting element that electrically connects the power connection pin(s) to the electrical control board.

[0005] Using the headphones according to the invention, the loudspeaker unit can be removed from the mounting space of the main housing and housed in the sound output channel. This is equivalent to installing a relatively large sound-generating unit in a smaller space. This makes it possible to design the main housing smaller, thereby reducing the overall volume and profile of the headphones. This significantly improves the wearing comfort and handling of in-ear headphones, especially those intended for use in situations such as sleeping, by reducing pressure on the ear and cheek, particularly when sleeping on one's side.

[0006] In contrast to the prior art, where the loudspeaker unit has its own small printed circuit board (PCBA) with solder pads and the electrical connection is made via wires, with one end of the wire soldered to the PCBA's solder pads and the other end to the main control board (since the PCBA takes up space and operation in the confined sound output duct is difficult), the present invention eliminates the PCBA in the loudspeaker unit by mounting the power connection pin(s) directly on the housing and exposing them. The first electrical connection element connects the power connection pin(s) directly to the electrical control board. This relocates the originally required solder joint outside the loudspeaker unit. On the one hand, the space required for the PCBA and the original solder points is eliminated, which reduces the height of the loudspeaker unit.On the other hand, relocating the connection point outside the loudspeaker unit allows the connection process to be carried out in a more spacious and accessible area, which significantly reduces the connection difficulty and improves production efficiency and the reject rate.

[0007] The first electrical connection element can be a flexible printed circuit board and / or the first electrical connection element can comprise a first connection section and a second connection section connected to each other, wherein preferably the first connection section is attached to the housing and / or electrically connected to the power connection pin and / or the second connection section is arranged separately from the housing and / or extends from the first connection section towards the electrical control board.

[0008] The headphones can further comprise a first reinforcement plate, wherein the first reinforcement plate is preferably arranged between the first connecting section and the housing.

[0009] The housing may further have a tuning opening and / or the first connecting section and / or the second connecting section may form a recess which preferably corresponds to the tuning opening.

[0010] The headphones may also include a battery that is electrically connected to the electrical control board.

[0011] Part of the battery may be located in the mounting space and / or another part of the battery may protrude into the sound output duct and / or a central axis of the battery and a central axis of the loudspeaker unit may be arranged at an angle to each other.

[0012] The part of the battery that protrudes into the sound output channel can be located on one side of the power connector pin and on one side of the first electrical connecting element facing away from the speaker unit.

[0013] The headphones may also include a second electrical connecting element, which preferably electrically connects the feedback microphone and the electrical control board.

[0014] The second electrical connection element can be a flexible printed circuit board and / or the first electrical connection element can be electrically connected to the second electrical connection element and / or be electrically connected to the electrical control board via the second electrical connection element.

[0015] The headphones may further include: a mounting frame, wherein the mounting frame is connected to the sound output side of the speaker unit and / or the feedback microphone is located on the mounting frame.

[0016] The mounting frame can include at least two support beams.

[0017] The at least two support brackets can be arranged symmetrically on the loudspeaker unit and / or the feedback microphone can be attached to the at least two support brackets.

[0018] The headphones may further comprise a second amplification plate, wherein preferably the second amplification plate is attached to the at least two support brackets and / or the feedback microphone is attached to the second amplification plate and / or part of the first electrical connecting element is arranged between the feedback microphone and the second amplification plate.

[0019] An end of the support bracket furthest from the loudspeaker unit may be bent to form a support part, and / or a recording space may be formed between the support part and the loudspeaker unit, and the feedback microphone may preferably be located in the recording space and spaced away from the loudspeaker unit.

[0020] The support part may have a positioning groove and / or the second reinforcement plate may have a positioning part and / or the positioning part may be installed in the positioning groove and / or the second reinforcement plate may further have a through-opening.

[0021] The mounting frame may further include a mounting ring, the mounting ring may preferably be connected to the housing and / or protrude on the sound emission side of the loudspeaker unit and / or the at least two support brackets may be attached to the mounting ring.

[0022] The first electrical connection element can be a flexible printed circuit board and / or the first electrical connection element can comprise a first connection section and a third connection section and / or the first connection section can be attached to the housing and electrically connected to the power connection pins and / or the third connection section can comprise at least one of the following: a first extension section connected to the first connection section; a bent section, one end of which is connected to the first extension section and which extends along a thickness direction of the housing, the bent section preferably being spaced apart from the loudspeaker unit; and a second extension section connected to the other end of the bent section and electrically connected to the feedback microphone. Brief description of the drawing

[0023] To illustrate the technical solutions in the embodiments or in the prior art more clearly, the drawings required to describe the embodiments or the prior art are briefly explained below. It is understood that the drawings in the following description represent only some embodiments. A person skilled in the art can derive other drawings from these without inventive step. Fig. Figure 1 is a schematic representation of the structure of a headphone according to some embodiments. Fig. Figure 2 is a schematic representation of the structure made up of Fig. 1 from a different angle (without ear wings and ear cap). Fig. Figure 3 is a schematic cross-sectional view along line AA in Fig. 2. Fig. Figure 4 is an enlarged schematic representation of area B in Fig. 3. Fig. 5 is a schematic representation of the internal structure of the in Fig. 1 structure shown. Fig. 6 is an exploded view of the in Fig. 5 shown structure. Fig. Figure 7 is another schematic representation of the structure from Fig. 1 from a different perspective. Fig. 8 is an exploded view of the in Fig. Structure shown in 7. Fig. 9 is another exploded view of the in Fig. Structure shown in 7. Fig. Figure 10 is another schematic representation of the internal structure of the in Fig. Structure shown in 7. Fig. 11 is an exploded view of the in Fig. 10 shown structures. Fig. Figure 12 is an exploded view of part of the in Fig. Structure shown in 7. Fig. Figure 13 is a schematic representation of a protective net according to some embodiments. Fig. Figure 14 is a schematic representation of the internal structure of a headphone according to some further embodiments. Fig. 15 is an exploded view of the in Fig. 14 shown structure. Fig. Figure 16 is a schematic top view of a part of a headphone according to some embodiments. Fig. Figure 17 is a schematic top view of a part of a headphone according to other embodiments. Fig. Figure 18 is a schematic top view of a part of a headphone according to further embodiments. Fig. Figure 19 is a schematic top view of a part of a headphone according to further embodiments. Reference symbol:

[0024] 100 Headphones; 10 Ear housing; 11 Main housing; 11a Mounting chamber; 111A Main area; 111A1 First mounting chamber; 112A Projection; 112A1 Second mounting chamber; 112A2 Tone hole; 112A3 Rear chamber tuning port; 111B Front housing section; 111B1 Front housing belly; 111B2 Front housing side; 111B3 Locking groove; 112B Rear housing section; 12 Sound outlet; 12a Sound output channel; 12b Sound outlet opening; 12c Limiting groove; 12d Mounting groove; 12e Receptacle; 121 Ring-shaped projection; 10a Pressure relief channel; 20 Ear wing; 21 Mounting bushing; 22 Contact area; 30 Ear cap; 30a Pressure relief groove; 30b Speaker opening; 31 Ring-shaped recess; 40 Charging area; 50 Magnet; 60 Antenna; 70 Feedforward microphone; 80 Feedback microphone; 90 Battery; 91 Speaker unit; 911 Housing; 911a Connection surface; 912 Power connection pin; 913 Mounting frame; 913A Support bracket; 9131 Support arm; 9132 Mounting plate; 9132a Positioning groove; 913B Mounting ring; 92 Protective net;92a Through opening; 921 Protection area; 922 Connection area; 9221 Flange; 923 Support area; 9231 Support foot; 93 First reinforcement plate; 94 Second reinforcement plate; 94a Through hole; 941 Reinforcement part; 942 Positioning part; 95 Electrical connection element; 951 First electrical connection element; 951a Recess; 9511 First connection section; 9512 Second connection section; 9513 Third connection section; 9514 First extension part; 9515 Bend part; 9516 Second extension part; 952 Second electrical connection element; 96 Electrical control board; 961 Contact points; 97 Fabric mesh; 98 Protective coating.; Detailed description of the embodiments

[0025] To more clearly illustrate the purpose, technical solution, and advantages of the present invention, the invention is described in further detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein serve only to explain the invention and not to limit it.

[0026] Headphones (also called earphones, headsets, or earpieces) typically consist of a pair of transducer units that receive electrical signals from a media player or receiver and convert them into audible sound waves using speaker units positioned near the ear. From the perspective of the overall audio industry, wireless headphones are still a relatively new phenomenon. Wireless headphones utilize Bluetooth technology for a wireless connection, allowing users to transmit audio wirelessly to a mobile phone or other devices. The main advantages of wireless headphones are the absence of cumbersome cables and their ease of portability and use, making them particularly suitable for use during sports activities.

[0027] Wireless headphones can be divided into in-ear headphones and on-ear headphones. The earbud part of in-ear headphones is slimmer and longer and must be fully inserted into the user's ear canal, effectively blocking out external ambient noise. On-ear headphones, on the other hand, do not penetrate the ear canal, exert less pressure on it, and are generally more comfortable to wear, especially for extended periods.

[0028] The embodiments are explained using the example of in-ear headphones. In other embodiments, the headphones can have different structures, for example, a semi-invasive (half-insertable) structure. The shape and structure of the headphones are not limited to the design described above. In the relevant technical field, designs for the external shape of headphones are already highly developed. Headphones can have various shapes and structures depending on requirements, which will not be discussed in detail here.

[0029] In the prior art, an in-ear headphone comprises a main housing and a sound outlet tube. The speaker unit is housed in a cavity within the main housing. The sound is directed through the sound outlet tube to the opening of the ear canal. This results in a relatively large volume for the main housing, which is detrimental to the user's comfort. Particularly in application scenarios where the user sleeps, a larger headphone can easily press on the ear and cheek when sleeping on one's side, causing discomfort and impairing sleep quality.

[0030] To solve the aforementioned problem, as described in the Fig. 1, Fig. 2, Fig. 3 and Fig. Figure 4 shows a headphone 100. The headphone 100 comprises an ear housing 10. The ear housing 10 is the main outer structural body of the headphone 10. Its interior provides space for electronic components and acoustic structures. The ear housing 10 includes a main housing 11 and a sound outlet 12. The main housing 11 is the main part of the ear housing 10. A mounting space 11a is provided in the main housing 11. The sound outlet 12 is connected to the main housing 11. The sound outlet 12 is a part of the headphone 100 responsible for directing sound to the user's ear. The shape of the sound outlet 12 can be cylindrical, elliptical cylindrical, oblique cylindrical, etc. Inside it is a sound output channel 12a, which is connected to the mounting space 11a. The sound outlet 12 also has a sound outlet opening 12b, which is connected to the sound output channel 12a.When the headphones 100 are put on, the sound outlet opening 12b is aligned towards the opening of the user's ear canal.

[0031] In these embodiments, the diameter of the sound outlet 12 is 3 mm to 6 mm and its length 3 mm to 10 mm. If the diameter of the sound outlet 12 is less than 3 mm, the sound transmission channel becomes too narrow, resulting in significant sound diffraction and reflection. High-frequency sounds are severely attenuated, and the sound quality becomes muffled. Furthermore, an opening that is too small can easily lead to excessive pressure in the listener's ear and cause discomfort. Conversely, while a diameter greater than 6 mm would provide a more permeable sound channel and reduce high-frequency loss, an opening that is too large would scatter the sound excessively and impair directivity, leading to sound energy losses in the environment outside the headphones 100 and reducing sound concentration and efficiency.Furthermore, a larger diameter could worsen the wearing comfort of the headphones 100 for the user and would hinder the miniaturization of the headphones 100. Similarly, a sound outlet length 12 of less than 3 mm would make the sound path from the speaker to the ear canal too short, resulting in a lack of acoustic impedance matching and acoustic filtering, and allowing the sound to hit the ear canal directly, thus impairing the overall listening experience. While a length exceeding 10 mm could contribute to some acoustic optimization, an excessively long tube would increase sound transmission losses, particularly in the high-frequency range, and make the sound muffled. This would also increase the complexity and space requirements of the headphones 100's internal structure and increase the overall dimensions of the headphones 100. Therefore, the diameter of the sound outlet 12 is limited to 3 mm to 6 mm and the length to 3 mm to 10 mm.

[0032] Furthermore, the main housing 11 can be made of metal, for example, but not limited to, stainless steel, aluminum alloy, titanium alloy, magnesium alloy, copper alloy, etc. Compared to materials such as plastic, a main housing 11 made of metal can be designed with a smaller minimum wall thickness due to its strength and manufacturing technology. This results in a smaller wall thickness for the sound outlet 12 of the headphones 100, thus facilitating smaller dimensions such as the outer diameter of the nozzle 400. The wall thickness of the sound outlet 12 can be 0.1–0.3 mm, e.g., 0.15 mm, 0.2 mm, 0.25 mm, etc. Moreover, a metal nozzle 400, at the same wall thickness, has higher rigidity than a plastic one and is less prone to deformation. This helps reduce resonances during use, improves the sound quality of the headphones 100, and increases the structural strength of the sound outlet 12.

[0033] As in the Fig. 3 and Fig. As shown in Figure 4, the headphones 100 further comprise an electronic control board 96, a loudspeaker unit 91, and a feedback microphone 80. The electronic control board 96 is housed in the mounting space 11a. The electronic control board 96 can control the overall functions of the headphones 100, process audio signals, manage the power supply, and serve as a connection point for other electronic components. The loudspeaker unit 91 is the core component of the headphones 100 for sound reproduction. It converts electrical signals into sound waves by moving air with the sound-generating unit (e.g., the diaphragm), thus producing the sound perceived by the user.

[0034] The loudspeaker unit 91 is located in the sound output channel 12a. The sound output channel 12a is the primary path by which sound is transmitted from the loudspeaker unit 91 to the ear canal. The placement of the loudspeaker unit 91 in the sound output channel 12a ensures that the sound propagates along the most direct path. The feedback microphone 80 is located in the sound output channel 12a. The feedback microphone 80 is designed to capture sound near the opening of the user's ear canal or within the cavity of the earphone 100, primarily for the active noise cancellation system. The feedback microphone 80 is positioned along the axial direction of the sound output channel 12a on the sound emission side of the loudspeaker unit 91 to minimize the space occupied by the feedback microphone 80 and the loudspeaker unit 91 within the radial space of the sound output channel 12a.The sound emission side of the loudspeaker unit 91 is the point where the sound leaves the loudspeaker unit 91 and enters the user's ear canal. Placing the feedback microphone 80 at this point is the most direct and closest position to the target sound field. If the feedback microphone 80 were too far from the target sound field (e.g., on the rear), the captured signal would be distorted and would contain more sound from non-target paths, resulting in inaccurate anti-sound generation and a significantly reduced noise reduction effect.

[0035] Furthermore, the feedback microphone 80 and the loudspeaker unit 91 are positioned at a distance from each other. If the feedback microphone 80 and the loudspeaker unit 91 were too close together, the feedback microphone 80 might not accurately capture the ambient noise, but rather the sound emitted directly from the loudspeaker unit 91. The spacing between them helps the feedback microphone 80 to more accurately detect residual noise in the listening area, thus improving the effectiveness of the active noise cancellation.

[0036] Furthermore, the distance between the loudspeaker unit 91 and the feedback microphone 80 along the axial direction of the sound output channel 12a is 0.2 mm to 0.5 mm. The structure of the sound outlet 12 itself is relatively narrow. If the distance between the two were greater, this would require more space in the axial direction of the sound output channel 12a, either by lengthening the sound outlet 12 or by compressing the space for other components. Both would directly lead to an increase in the size of the sound outlet 12 or even the entire ear housing 10. By limiting the distance to this very small range of 0.2–0.5 mm, the axial arrangement efficiency within the sound outlet 12 is optimized. This allows the loudspeaker unit 91 and the feedback microphone 80 to be arranged compactly, minimizing their space requirement in the axial direction of the sound output channel 12a.This compact arrangement makes it possible to design the structure of the sound outlet 12 to be shorter and more compact, while at the same time ensuring the acoustic performance (such as the already mentioned precise sound capture).

[0037] Based on the headphones 100 in the embodiments, the loudspeaker unit 91 is removed from the mounting space 11a of the main housing 11 and installed in the sound output channel 12a. This is equivalent to installing a relatively large sound source in a smaller space. This allows the main housing 11 to be made smaller, which in turn reduces the overall volume and profile of the headphones 100. For in-ear headphones 100, especially those intended for use during sleep, this significantly improves wearing comfort and ease of use, as it reduces pressure on the ear and cheek when sleeping on one's side.

[0038] As in Fig. 5 and Fig. As shown in Figure 6, the loudspeaker unit 91 comprises a housing 911, a magnetic circuit system, and a vibration system. Both the magnetic circuit system and the vibration system are housed in the housing 911. The housing 911 protects the magnetic circuit system and the vibration system from damage and fixes the position of the magnetic circuit system so that it can move stably and linearly within the magnetic field. The vibration system comprises a voice coil and a diaphragm, the voice coil being the component that excites the diaphragm to vibrate.

[0039] For the voice coil to be energized and move, current must flow into the voice coil and form a closed circuit within it. Therefore, the loudspeaker unit 91 also includes power connection pins 912, which are exposed from the housing 911. The power connection pins 912 conduct the external audio signal to the voice coil of the loudspeaker unit 91, causing the voice coil to generate a corresponding mechanical movement in the magnetic field according to the signal change, thus exciting the diaphragm to vibrate. The power connection pins 912 can be considered voice coil pins; their function remains to ensure that the voice coil pins receive current so that the voice coil can operate.

[0040] In contrast to the prior art, in which the loudspeaker unit 91 has its own small printed circuit board (PCBA) with solder pads and the electrical connection is made via wires, with one end of the wire being soldered to the solder pads of the PCBA and the other end to the main control board, since the PCBA takes up space and operation in the confined sound output channel 12a is difficult, the headphones 100 in the embodiments further comprise a first electrical connecting element 951. The first electrical connecting element 951 connects the power connection pins 912 directly to the electrical control board 96. The first electrical connecting element 951 can be soldered to the power connection pins 912 to conduct the electrical signal (audio current) from the electrical control board 96 to the voice coil and thus excite it to oscillate.

[0041] By eliminating the PCBA in the speaker unit 91 and directly exposing the power connection pins 912 on the housing 911, connected to the direct electrical connection to the electrical control board 96 via the first electrical connection element 951, the originally required solder joints are relocated to the outside, outside the speaker unit 91. This allows the external first electrical connection element 951 to directly access and connect these power connection pins 912.

[0042] On the one hand, the elimination of the space originally required inside the loudspeaker unit 91 to accommodate the PCBA board and its associated solder joints completely removes this volume and height. This not only directly reduces the height profile of the loudspeaker unit 91 itself, making it flatter and shortening the axial height of the sound outlet 12, thus allowing for a more compact design and reducing the perceived intrusion into the ear canal. On the other hand, relocating the connection points outside the loudspeaker unit 91 enables connection operations to be carried out in a more spacious, easily accessible area, which significantly simplifies the connection process, increases production efficiency, and boosts the yield of defect-free products.In a more manageable environment, the likelihood of problems such as poor connections or cold kills is significantly reduced, which in turn reduces rework and scrap due to connection problems, ultimately lowering overall production costs and increasing the stability of product quality.

[0043] The first electrical connection element 951 is a flexible printed circuit board (FPC). Flexible printed circuit boards are bendable and foldable and can adapt well to the complex and limited space inside the sound outlet 12. An FPC can easily bend or twist to connect the power connection pins 912 in the shortest, most direct way and be routed along the curvature or internal structure of the ear housing 10, making the entire internal arrangement more compact and contributing to the miniaturization of the headphones 100.

[0044] In some embodiments, the first electrical connection element 951 comprises a first connection section 9511 and a second connection section 9512, which are connected to each other. The first connection section 9511 is mounted on the housing 911 and electrically connected to the power connection pins 912, enabling direct, close contact with the power connection pins 912 of the loudspeaker unit 91. This minimizes contact resistance and the possibility of signal interference, and ensures the stability and accuracy of signal transmission, thus providing a solid foundation for subsequent audio signal processing.The second connecting section 9512 is arranged separately from the housing 911 and extends from the first connecting section 9511 towards the electrical control board 96, which allows parts of the first electrical connecting element 951 to bend or twist flexibly, so that the connecting path can be laid along the most optimized, shortest and least disruptive path inside the headphones 100 in order to adapt to the complex curves and spatial conditions inside the headphones 100.

[0045] Furthermore, the housing 911 has a connecting surface 911a. The connecting surface 911a is an end face of the loudspeaker unit 91, facing away from the sound outlet opening 12b. Using the example of a cylindrical loudspeaker unit 91: if the sound output side is one end of the cylinder, then the connecting surface 911a is the opposite end face, i.e., the other end of the cylinder. Specifically, the power connection pins 912 extend beyond the connecting surface 911a, which makes it easier for the first connection section 9511 to directly cover them and establish a stable electrical connection, thus avoiding problems with poor contact due to obstruction by the housing 911 and ensuring the stability and accuracy of the electrical signal transmission.The first connecting section 9511 covers part of the connecting surface 911a, further increasing the contact area between the power connection pins 912 and the first connecting section 9511 and thus improving stability. The electrical connection path in these embodiments is direct and simple, avoiding the need for complex wiring, making the internal wiring of the headphones 100 more compact, and thus offering greater possibilities for miniaturizing the headphones 100.

[0046] Given that the speaker unit 91 vibrates during operation and the first electrical connection element 951 (especially FPC) is relatively soft, a direct connection to the power connector pins 912 could lead to unstable connections or even detachment due to vibrations, which could directly affect the user experience, resulting in intermittent sound quality, signal loss, or even the complete failure of the headphones 100.

[0047] As in the Fig. 4, Fig. 5 and Fig. As shown in Figure 6, in some embodiments of the headphones 100, a first reinforcement plate 93 is included to solve this problem. The first reinforcement plate 93 is located at the power connection pins 912 and is positioned between the housing 911 and the first connection section 9511. It not only provides additional physical protection for the power connection pins 912 and their connection points, but also acts as a buffer and insulator, reduces the effects of external vibrations on the connection points, and mitigates direct shocks to the power connection pins 912, thereby extending the service life of the power connection pins 912 and the associated components.

[0048] Even more importantly, it significantly increases structural stability in this area. By being positioned between the housing 911 and the first connection section 9511, the first reinforcement plate 93 acts as a solid support structure, ensuring a more stable and reliable electrical contact point between the power connection pins 912 and the first connection section 9511, and effectively preventing loosening or even damage due to minute vibrations or external forces during daily use.

[0049] It should be noted that the first reinforcement plate 93 does not completely cover the contact point between the first electrical connection element 951 and the power connection pins 912. The first reinforcement plate 93 has openings or gaps in the electrical connection area or leaves sufficient space above / below the connection area so that the first electrical connection element 951 can touch the power connection pins 912 and, if soldering is performed, solder can melt and flow to complete the soldering process.

[0050] Furthermore, the housing 911 is circular and thinly disc-shaped at the end near the first electrical connecting element 951. A portion of this end, electrically connected to the power connection pins 912, is glued to the first reinforcement plate 93. This portion may be the aforementioned first connecting section 9511. Additionally, the remaining portion of this circular, thin disc, a portion not glued to the first reinforcement plate 93 (this could be part of the second connecting section 9512), is not fixed, leaving it in a non-rigid connection state with the loudspeaker unit 91 and allowing it a degree of movement.This design gives the first electrical connecting element 951 near the loudspeaker unit 91 specific structural features: One part is held firmly by the first reinforcement plate 93, while another part can tilt or bend relative to the fixed part in order to be arranged in the extension direction.

[0051] With reference to Fig. 4, Fig. 5 and Fig. 6 In some embodiments, a protective lacquer 98 is applied to the connection point between the first connection section 9511 and the power connection pins 912. The protective lacquer 98 is located on one side of the first connection section 9511 that faces away from the first reinforcement plate 93. Although the solder joints of the power connection pins 912 and the first electrical connection element 951 establish the electrical connection, this connection point can be subjected to stress during daily use of the headphones 100 (e.g., bending, squeezing, vibration). After curing, the protective lacquer 98 firmly bonds the solder joints, the power connection pins 912, and the first connection section 9511 together, forming a single unit. This significantly increases the mechanical strength of the connection point and prevents the solder joints from cracking or the pins from loosening due to vibration or stress, thereby improving the long-term reliability of the connection.In addition, the hardened protective lacquer 98 forms an insulating layer that prevents solder joints or power connection pins 912 from accidentally coming into contact with other conductive parts and causing short circuits.

[0052] Since the inner diaphragm of the loudspeaker unit 91 moves back and forth during operation, causing variations in the pressure within the housing, a completely closed housing would lead to a build-up of pressure that would impede the diaphragm's movement, restrict its freedom of movement, and thus impair sound quality. Therefore, the housing 911 of the loudspeaker unit 91 also features a tuning port. This tuning port effectively equalizes the pressure inside and outside the housing. This design prevents pressure from accumulating and hindering diaphragm movement, allowing the diaphragm to vibrate more freely and thus improving the clarity and dynamic range of the sound.

[0053] As in the Fig. 5 and Fig. As shown in Figure 6, the first electrical connecting element 951 has a recess 951a corresponding to the tuning port. The recess 951a can be formed by the first connecting section 9511 and / or the second connecting section 9512. That is, the recess 951a can be formed by the first connecting section 9511 alone, or by the second connecting section 9512 alone, or it can be formed by the combined arrangement of the first and second connecting sections 9511 / 9512. The recess 951a bypasses the position of the tuning port, so that the first electrical connecting element 951 can be flexibly positioned near the tuning port without impairing its function.

[0054] As in the Fig. 4, Fig. 7, Fig. 8 and Fig. As shown in Figure 9, in some embodiments the headphones 100 further includes a battery (in particular an accumulator / rechargeable battery) 90, which is electrically connected to the electronic control board 96. The battery 90 primarily serves as a power supply, providing current to all electronic components in the headphones 100 and making the headphones 100 a self-contained audio device that is not entirely dependent on an external power source. The specific form of the battery 90 is not limited; for example, a rechargeable lithium-ion battery 90 can be used.

[0055] Due to the limited space inside the headphones 100, particularly in smaller models, part of the battery 90 is housed in the mounting space 11a in some embodiments, while another part protrudes into the sound output channel 12a. Furthermore, the central axis of the battery 90 is oriented at an angle to the central axis of the loudspeaker unit 91. This allows the battery 90 to adapt more flexibly to the limited and irregular space available inside the headphones 100. In extremely confined spaces, especially in miniaturized designs, this non-parallel arrangement can significantly improve space utilization.The battery 90 is no longer limited to a coaxial or parallel arrangement with the loudspeaker unit 91, but can be tilted or rotated at an angle to bypass other critical components or structures, making the overall structure more compact and avoiding assembly difficulties or performance losses caused by mutual compression or interference between the components.

[0056] In this arrangement, a portion of the battery 90, which protrudes into the sound output channel 12a, is located on one side of the power connection pins 912. This effectively utilizes the limited interior space of the headphones 100. Specifically, the structure of the portion of the battery 90 protruding into the channel can lie at least partially within the vertical range of the power connection pins 912. That is, the position of this portion of the battery 90 in the vertical direction (the "height" direction) lies at least partially within the vertical height range occupied by the power connection pins 912 of the loudspeaker unit 91. Furthermore, the portion of the battery 90 protruding into the channel is located on the side of the first electrical connection element 951 facing away from the housing 911.When designing the routing path for the first electrical connection element 951, the shortest or optimal path can be selected more effectively to connect from the vicinity of the battery 90 to the required power supply or signal transmission points. This enables more efficient use of space in limited areas and a more compact internal structure. If the battery 90 were housed entirely within the sound outlet 12, the configured battery capacity would be too low due to the small overall volume and limited length of the sound outlet 12, resulting in a short operating time for the headphones 100 that might not meet basic usage requirements. Conversely, if the battery 90 were housed entirely within the main housing 11, it would occupy more space within the main housing 11, leading to a larger volume for the main housing 11 and compromising the miniaturization design of the headphones 100.

[0057] Partial penetration into the sound output channel 12a ensures sufficient battery capacity to guarantee adequate operating time, while simultaneously preventing the battery 90 from occupying most of the space in the main housing 11, allowing the main housing 11 to be designed more compactly, while at the same time arranging the internal structure as compactly as possible in the limited space of the ear housing 10.

[0058] As in the Fig. 9, Fig. 10 and Fig. As shown in Figure 11, in some embodiments the headphones 100 further comprise a protective mesh 92 and a second electrical connecting element 952. The protective mesh 92 is connected to the sound outlet 12 and covers the sound outlet opening 12b. The protective mesh 92 prevents foreign bodies (such as dust, dirt) from entering the ear housing 10 through the sound outlet opening 12b. The protective mesh 92 is electrically connected to the grounding terminal of the electrical control board 96. The feedback microphone 80 is also mounted on the protective mesh 92, with the protective mesh 92 itself serving as a mounting base, for example, by laser welding. This reduces the need for additional structures (such as separate brackets, long cables, etc.) used in conventional designs for microphone mounting and sound guidance, thus saving interior space.The second electrical connection element 952 establishes the electrical connection between the feedback microphone 80 and the electrical control board 96. The second electrical connection element 952 serves to transmit the audio signal detected by the feedback microphone 80 from the microphone to the corresponding signal processing connections on the electrical control board 96.

[0059] The second electrical connection element 952 is a flexible printed circuit board (FPC). Flexible printed circuit boards are bendable and foldable and adapt well to the complex and limited space within the sound outlet 12. The FPC can easily bend or twist to create the shortest and most direct path between the feedback microphone 80 and the electrical control board 96, and can be routed along the curves or internal structure of the ear housing 10, making the overall internal layout more compact and contributing to the miniaturization of the headphones 100.

[0060] Furthermore, the Feedback Microphone 80 can be mounted directly onto the flexible circuit board using surface mounting technology, which is suitable for mass production and offers high efficiency and reliability.

[0061] The embodiments integrate several components (protective mesh 92, FB MIC, loudspeaker unit 91) and connect them directly to the sound outlet 12. These functional modules are concentrated in a limited space, and the compact arrangement of the feedback microphone 80 on the protective mesh 92 within the sound outlet 12 contributes to the miniaturization of the headphones 100, especially in the confined space of the sound outlet 12, and enables a more efficient integration of the microphones and protective structures required for noise suppression without significantly increasing the overall dimensions.

[0062] Since the feedback microphone 80 is located near the sound outlet 12b, which is the direct point of contact between the headphones 100 and the outside world for the exchange of air and sound, this is also the point where static electricity is most likely to penetrate. If a user accidentally touches the sound outlet 12b with an electrostatically charged finger or other object, the static electricity can directly affect the feedback microphone. Feedback microphones 80 are micro-microphones whose sensitive components (such as the diaphragm and amplifier circuitry) are highly susceptible to static electricity. Even a tiny electrostatic pulse can lead to a loss of performance or even the complete failure of the feedback microphone 80.

[0063] Therefore, in these embodiments, the protective mesh 92 is electrically connected to the grounding terminal of the electrical control board 96. The protective mesh 92 can be made of metal or a conductive material that can readily conduct electrostatic charges. That is, the protective mesh 92 is designed as a conductive material (such as a metal grid or coated mesh) that collects electrostatic charges and conducts them to the grounding terminal of the electrical control board 96. This grounding design allows the static electricity acting on the protective mesh 92 to be dissipated to a safe grounding point, thus preventing the static electricity from directly affecting or arcing through the feedback microphone 80 mounted on the protective mesh 92 and ensuring effective protection of the microphone component against electrostatic damage. This increases the electrostatic resistance of the headphones 100 and the overall service life of the product.

[0064] When the protective net 92 is grounded, it can also form effective electromagnetic shielding and reduce interference with the internal circuitry caused by external electromagnetic waves. This is particularly important for the feedback microphone 80, as microphones must capture ambient noise with high precision, and electromagnetic interference can impair noise cancellation performance.

[0065] Specifically, the protective mesh 92 is a protective steel mesh. Protective steel meshes have high strength and toughness, effectively protecting against damage from vibrations, external impacts, or accidental bumps during daily use, thus ensuring the stability and durability of the protective steel mesh over the long term. Additionally, protective steel effectively conducts static electricity, thereby reducing its direct impact on the feedback microphone 80.

[0066] In some embodiments, the protective mesh 92 is connected to the grounding terminal of the electrical control board 96 via the second electrical connection element 952. Static electricity initially acts on the protective mesh 92. The protective mesh 92 itself, or its conductive part, becomes the first point of contact or induction of the static electricity. The protective mesh 92 is connected to the electrical control board 96 inside the headphones 100 via a predetermined second electrical connection element 952. The charge flows through the second electrical connection element 952 and finally reaches the grounding terminal of the electrical control board 96 (which typically contains critical circuits such as processing chips, power management, amplifiers, etc.).The static electricity is effectively diverted into a safe area, preventing it from accumulating to the point where it could damage the highly sensitive feedback microphone 80, thus protecting the feedback microphone 80 from electrostatic destruction.

[0067] This avoids the need to create separate additional connection paths or structures solely for grounding, which saves space, especially in the sound outlet 12, where space is typically limited.

[0068] As in Fig. 6 and Fig. As shown in Figure 11, the first electrical connection section 951 builds upon the previous one and serves to connect the speaker unit 91 to the main control board. Due to the limited space in the ear housing 10 and the complexity of the structural arrangement, one end of the first electrical connection element 951 is specifically electrically connected to the power connection pins 912, while the other end extends to the inner wall of the ear housing 10 and has double-sided solder pads. A direct connection of the first electrical connection element 951 to the main control board could cause problems such as excessively long traces and a large space requirement. Therefore, the end of the first electrical connection element 951 with the double-sided solder pads is electrically connected to the second electrical connection element 952 and is electrically connected via this to the electrical control board 96.The second electrical connection element 952 is not only electrically connected to the feedback microphone 80, but also serves as the electrical connection to the loudspeaker unit 91, transmitting its signals and power supply. This allows for effective control of the cable length of the first electrical connection element 951 and reduces the space required by the circuit leads within the ear housing 10. Furthermore, the multifunctionality of the second electrical connection element 952 (connecting both to the loudspeaker unit 91 and the feedback microphone 80) further optimizes the arrangement of electrical connections within the ear housing 10, thus enabling effective integration and signal transmission of the various electronic components within the limited space of the ear housing 10.

[0069] As in the Fig. 4, Fig. 5, Fig. 6 and Fig. As shown in Figure 11, in some embodiments the headphones 100 further includes a second reinforcement plate 94. The second reinforcement plate 94 is mounted in the sound output channel 12a and connected to the protective mesh 92. The feedback microphone 80 is mounted on the second reinforcement plate 94. The second reinforcement plate 94 provides additional support for the feedback microphone 80 and can effectively prevent the feedback microphone 80 from losing its position or being damaged during use of the headphones 100 due to mechanical vibrations or external forces.

[0070] In practical applications, the electrical connection is usually made by soldering. The second electrical connection element, 952, is a flexible printed circuit board (PCB). Flexible PCBs and the protective mesh (typically metal) expand and contract at different rates with temperature fluctuations. This difference creates persistent mechanical stresses at the solder joints. As a result, the solder joints (tin spots) can easily develop cracks, known as "tin cracks," during the soldering process or in use. This phenomenon of tin cracking compromises the stability of the electrical connection and the performance and reliability of the 100 headphones.

[0071] Therefore, in these embodiments, the second reinforcement plate 94 is electrically connected to the second electrical connecting element 952. The second reinforcement plate 94 supports a portion of the second electrical connecting element 952, on which the feedback microphone 80 is mounted. The second reinforcement plate 94 can be made of a harder metal and provides stronger support than the protective mesh 92. During the soldering process, the stresses acting on the solder joints (tin points) are distributed, thereby reducing the risk of cracking due to stress concentrations. This ensures the stability of the entire internal structure of the sound outlet 12 during use and reduces damage from mechanical vibrations or external forces.

[0072] Furthermore, the second reinforcement plate 94 is electrically connected to the second electrical connection element 952 to connect the protective mesh 92 to the grounding lead of the electrical control board 96. This means that the second reinforcement plate 94 not only provides mechanical support to the protective mesh 92 but also serves to dissipate electrostatic charge. Electrostatic charge is generated and conducted to the protective mesh 92 of the headphones 100. The electrostatic charge then conducts via the protective mesh 92 to the second reinforcement plate 94 and from there to the second electrical connection element 952. The second electrical connection element 952 then conducts the electrostatic charge to the grounding lead of the electrical control board 96, where it is dissipated via the grounding lead to the electrostatic protection circuit on the electrical control board 96.

[0073] As in the Fig. 4, Fig. 5, Fig. 6 and Fig. As shown in Figure 11, the feedback microphone 80 is still mounted on the side of the second amplification plate 94 facing the protective mesh 92. On the one hand, this allows for optimal use of the space between the second amplification plate 94 and the protective mesh 92, avoiding structural conflicts or excessive space utilization due to incorrect positioning of the feedback microphone 80 and further optimizing the compact design of the headphones 100. On the other hand, its placement on the side of the second amplification plate 94 facing the protective mesh 92 ensures that the feedback microphone 80 is closer to the sound source (e.g., the ear canal), thus improving the accuracy and sensitivity of signal pickup.

[0074] Specifically, the second reinforcement plate 94 is a stainless steel plate. Stainless steel plates have good corrosion resistance, effectively resisting the attack of sweat, moisture, and other corrosive substances in daily use. This extends the service life of the second reinforcement plate 94 and ensures its long-term stable support and conductivity. Furthermore, stainless steel effectively conducts and quickly dissipates electrostatic charges, thus improving the electrostatic protection of the headphones 100.

[0075] The thickness of the stainless steel plate can range from 0.1 cm to 0.2 cm. If the thickness is less than 0.1 cm, its strength decreases, and it becomes more prone to bending, deformation, or even damage during use. If the thickness exceeds 0.2 cm, its weight and material costs increase. An excessively thick stainless steel plate detracts from the miniaturization and slim design of the Headphone 100. A thickness between 0.1 cm and 0.2 cm represents a good compromise, ensuring sufficient strength and protective properties without causing problems in processing, assembly, or cost due to over- or under-sizing.

[0076] As in Fig. As shown in Figure 12, in some embodiments the sound outlet 12 on the inner wall of the sound output channel 12a has a limiting groove 12c at one end near the sound outlet opening 12b. The limiting groove 12c is annular and provides a precise mounting position. The protective mesh 92 is inserted into the limiting groove 12c and connected to its groove wall. Specifically, the protective mesh 92 can be connected to the groove wall of the limiting groove 12c, for example, by gluing it in order to securely fix it to the sound outlet 12 and prevent easy movement, tilting, or detachment. This also increases the resistance of the protective mesh 92 to external impacts (e.g., accidental scratching by the user). Even under a certain amount of force, the protective mesh 92 is less likely to be damaged or deformed, which increases the product's durability.

[0077] As in Fig. 12 and Fig. As shown in Figure 13, the protective net 92 comprises a protective area 921 and a connecting area 922. The protective area 921 is net-shaped and closes the sound outlet opening 12b. It is understood that the net structure of the protective area 921 allows unimpeded sound transmission, ensures that sound can be transmitted from the interior to the user's ear canal, and allows the feedback microphone 80 to detect external sound. The connecting area 922 is arranged in a ring shape at the edge of the protective area 921. The connecting area 922 extends from the connection point with the protective area 921 towards the side facing away from the sound outlet opening 12b. The connecting area 922 can be uniformly and continuously serrated.This design not only increases the contact area between the connection area 922 and the groove wall of the limiting groove 12c, but also, due to its unique shape, distributes stresses so that, in the event of force or vibrations acting on the protective mesh 92, the stresses are distributed evenly, thus preventing damage due to local stress concentrations. The connection area 922 is located within the perimeter of the protective area 921 and connected to the groove wall of the limiting groove 12c. Continuing the above, the protective mesh 92 is bonded to the groove wall of the limiting groove 12c via the connection area 922, ensuring a firm, multi-point, and uniform contact and a stable connection between the protective mesh 92 and the limiting groove 12c.

[0078] Specifically, the connection area 922 comprises a circumferential flange 9221 connected to the protective area 921. The flange 9221 is arranged in a ring around the circumference of the protective area 921 and extends towards one side facing away from the sound outlet opening 12b. The flange 9221 has several evenly spaced teeth around its circumference. The toothed structure increases the contact area and friction between the flange 9221 and the groove wall of the limiting groove 12c. Furthermore, the toothed structure forms a similar locking effect with the groove wall of the limiting groove 12c, anchoring it more firmly in the groove wall and preventing the protective mesh 92 from loosening, detaching, or rotating due to vibrations, external forces, or minimal movements during use. Compared to a smooth flange 9221, the teeth provide a stronger locking force.

[0079] As in the Fig. 6, Fig. 12 and Fig. As shown in Figure 13, the protective mesh 92 further comprises a support area 923. The support area 923 extends within the sound output channel 12a from the connection area 922 towards the main housing 11. One end of the support area 923, which is furthest from the connection area 922, is bent towards the center position of the centerline of the sound outlet opening 12b. The second reinforcement plate 94 is mounted on the support area 923. Understandably, the second reinforcement plate 94 and the protective area 921 are spaced axially apart along the sound output channel 12a. A portion of the support area 923, which is connected to the second reinforcement plate 94, is arranged parallel to the protective area 921.Therefore, the support area 923 resembles a structure that extends roughly axially from the connection area 922, then bends inwards (towards the center) halfway along its length, and finally provides a connection surface parallel to the second reinforcement plate 94. This offers the second reinforcement plate 94 an ideal, stable mounting base. This parallel design ensures that the second reinforcement plate 94 can distribute stresses evenly and interact more effectively with the support area 923 and the entire protective mesh 92 to maximize the reinforcing effect.

[0080] Specifically, the support area 923 comprises two support feet 9231, which are arranged relative to the radial direction of the protective area 921. Accordingly, the second reinforcement plate 94 comprises a reinforcement element 941 and two positioning elements 942. The reinforcement element 941 is electrically connected to the electrical connecting element 95 and supports the feedback microphone 80. The two positioning elements 942 are each attached to the two ends of the reinforcement element 941 and extend to both sides to be connected to the two support feet 9231. The opposing arrangement of the two support feet 9231 and the two positioning elements 942 forms a stable support structure that effectively prevents the second reinforcement plate 94 from shifting or tilting during use due to vibrations or external forces, thus increasing the stability of the internal structure of the sound outlet 12.

[0081] As in Fig. 6, Fig. 12 and Fig. As shown in Figure 13, to further increase the stability of the support area 923 on the inner wall of the sound output duct 12a of the sound outlet 12, a fastening groove 12d connected to the limiting groove 12c is also provided. Part of the structure of the support area 923 engages in the fastening groove 12d. This can increase the connection stability of the support area 923 on the inner wall of the sound outlet 12 and ensure that the support area 923 does not shift during installation, thus guaranteeing the assembly accuracy of the entire assembly. In addition, the fastening groove 12d provides a defined mounting position for the support area 923, which can reduce quality problems due to improper assembly.

[0082] Continuing the above, two fastening grooves 12d are provided corresponding to the two support feet 9231. The two fastening grooves 12d are radially opposite each other. If the protective net 92 attempts to rotate around the center point of the sound outlet opening 12b, the portion of the support area 923 that engages in the fastening groove 12d forms an obstruction. Therefore, the protective net 92 cannot rotate freely in the limiting groove 12c, thus fixing it in the predetermined position within the limiting groove 12c.

[0083] Accordingly, the protective net 92 is connected to the second reinforcement plate 94 via the support area 923, thus preventing the second reinforcement plate 94 from rotating in the sound output channel 12a. The attached electrical connection element 95 can also remain relatively fixed, which prevents damage, breakage, or loss of performance of the electrical connection element 95 due to repeated twisting or accidental rotation and increases the reliability of the connection.

[0084] It should be noted that the mounting groove 12d has a guide ramp. The guide ramp is inclined away from the centerline of the sound output channel 12a and towards the sound outlet opening 12b. When the support area 923 is to engage in the mounting groove 12d, it initially encounters the far side of the guide ramp. Because the ramp is guided, the support area 923 can be "guided" or "slid" along this ramp into the deeper side of the mounting groove 12d. In this way, the support area 923 can slide relatively easily and smoothly into the mounting groove 12d and ultimately anchor itself in the specified position.

[0085] As in Fig. 14 and Fig. As shown in Figure 15, the feedback microphone 80 cannot be supported by the protective mesh 92. In some embodiments, the loudspeaker unit 91 further includes a mounting frame 913 connected to the loudspeaker unit 91. The mounting frame 913 is located on the sound-emitting side of the loudspeaker unit 91 and extends towards the sound outlet opening 12b. The feedback microphone 80 is mounted on the mounting frame 913. This places the feedback microphone 80 very close to the sound source (loudspeaker diaphragm). As mentioned earlier, the proximity to the sound-emitting side of the loudspeaker unit 91 helps to accurately capture the loudspeaker signal, optimize active noise cancellation, and suppress feedback. In addition, the direct integration of the feedback microphone 80 into the loudspeaker unit 91 increases the integration density of the components.This is particularly advantageous for miniaturizing and reducing the weight of the headphone design 100, as various components can be arranged more efficiently in a limited space.

[0086] As in Fig. 16, Fig. 17 and Fig. As shown in Figure 18, the mounting frame 913 specifically comprises at least two support brackets 913A. These at least two support brackets 913A are arranged symmetrically on the loudspeaker unit 91, for example, but not limited to, four, six, eight, etc. The multiple support brackets 913A can be arranged in pairs spaced apart. The feedback microphone 80 is mounted on at least two support brackets 913A; that is, the multiple support brackets 913A are located on opposite sides of the feedback microphone 80 to jointly enable its mounting on the sound-emitting side of the loudspeaker unit 91. Fixing the microphone at multiple points instead of a single point improves its mounting stability. The space between each pair of support brackets 913A can then be used for the sound emitted by the loudspeaker 91.

[0087] Similar to the above method for preventing tin cracking at the first electrical connection element 951, a second reinforcing plate 94 is also arranged in these embodiments. The second reinforcing plate 94 is mounted on at least two support brackets 913A. The second reinforcing plate 94 can be connected to the mounting frame 913, for example, by soldering or gluing, while 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 connection element 951.

[0088] Furthermore, the second reinforcement plate 94, the mounting frame 913, and the housing 911 enclose a recording chamber 12e. The feedback microphone 80 is located within the recording chamber 12e. Thus, the second reinforcement plate 94, the mounting frame 913, and the housing 911 work together to restrict the movement of the feedback microphone 80 in certain directions. Part of the first electrical connecting element 951 is positioned between the feedback microphone 80 and the second reinforcement plate 94, which ensures the stability of the electrical contact of the first electrical connecting element 951 and reduces changes in contact resistance or interruptions caused by physical displacement.

[0089] In some embodiments, the support bracket 913A comprises a connected support arm 9131 and a bearing element 9132. The support arm 9131 is connected to the housing 911 and extends toward the sound outlet opening 12b. The bearing element 9132 is formed by bending one end of the support bracket 913A that is furthest from the loudspeaker unit 91. The bearing element 9132 has a positioning groove 9132a for receiving the second reinforcement plate 94. The two positioning parts 942 of the second reinforcement plate 94 can each be mounted in the two positioning grooves 9132a to support the second reinforcement plate 94 on the mounting frame 913.Mounting the feedback microphone 80 on the reinforcement plate instead of directly on the mounting frame 913 allows for better distribution of the microphone's weight and any potential micro-vibrations, preventing deformation or damage to the mounting frame 913 from long-term stress or vibration. The two mounting frames 913 also distribute the weight of the reinforcement plate and the feedback microphone 80 more evenly, increasing the structural stability and resistance to deformation of the entire assembly.

[0090] The second reinforcement plate 94 also has a through-hole 94a, specifically in the reinforcement section. The through-hole 94a extends through the thickness of the second reinforcement 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, lower-resistance propagation path for sound detection, ensuring that sound can reach the feedback microphone 80 more effectively and thus improving detection accuracy and sensitivity.

[0091] Furthermore, the support element 9132, together with the loudspeaker unit 91, forms the aforementioned recording space. The feedback microphone 80 is mounted on one side of the second reinforcement plate 94, which faces the loudspeaker unit 91, and spaced apart from it. This allows for optimal use of the space between the two support arms 9131, enabling a more compact structural arrangement within the sound outlet 12 and shortening the axial length of the sound outlet 12.

[0092] In other embodiments, the shape of the support part 9132 is not limited. For example, an end of the support part 9132 that is away from the support arm 9131 can be plate-shaped.

[0093] As in Fig. As shown in Figure 19, the support part 9132 can, for example, be a strip-shaped plate to facilitate the connection with the second reinforcing plate 94. In some embodiments, the width of the support part 9132 can be 0.15 mm to 1.0 mm, for example, 0.2 mm, 0.5 mm, 0.8 mm, etc. In other embodiments, the width of the support part 9132 can also be designed to other dimensions as required. The support part 9132 can be designed in other shapes, for example, cylindrical.

[0094] Furthermore, the mounting frame 913 includes a mounting ring 913B. Understandably, the mounting ring 913B is ring-shaped, connected to the housing 911, and projects outwards on the sound-emitting side of the loudspeaker unit 91. At least two support brackets 913A are connected to the mounting ring 913B. The mounting ring 913B provides more stable and reliable support to the support brackets 913A, better transfers the force of the support brackets 913A to the stable housing 911, distributes stresses, and reduces local pressure on the loudspeaker unit 91 itself or its edge.

[0095] As in Fig. 14 and Fig. As shown in Figure 15, in some embodiments the first electrical connecting element 951 is a flexible printed circuit board. The first electrical connecting element 951 comprises a first connecting section 9511 and a third connecting section 9513. The first connecting section 9511 is mounted on the housing 911 and electrically connected to the power connection pins 912. The third connecting section 9513 comprises a first extension part 9514, a bending part 9515, and a second extension part 9516. The first extension part 9514 is connected to the first connecting section 9511 and extends partially beyond the outside of the housing 911. One end of the bending part 9515 is connected to the first extension part 9514 and extends along the thickness of the housing 911. The bending part 9515 is spaced apart from the loudspeaker unit 91.The second extension piece 9516 is connected to the other end of the bent section and electrically connected to the feedback microphone 80. This segmented and bent design allows the flexible circuit board to adapt more flexibly to the complex three-dimensional space inside the headphones 100. The first extension piece 9514 can extend to a specific position outside the housing 911, the bent section 9515 can change the orientation of the flexible circuit board, and the second extension piece 9516 can be precisely connected to the position of the feedback microphone 80. This enables precise, reliable electrical connections within the compact structure of the headphones 100.

[0096] In some embodiments, the loudspeaker unit 91 is located on the side of the feedback microphone 80 facing the main housing 11. This means that, compared to the loudspeaker unit 91, the feedback microphone 80 is positioned closer to the sound outlet opening 12b. If the feedback microphone 80 were too far from the sound outlet opening 12b, the detected ambient noise might have experienced more reflections and attenuation in the sound output channel 12a and might not be the actual ambient noise directly at the entrance of the ear canal. In these embodiments, the feedback microphone 80 is positioned closer to the sound outlet opening 12b compared to the loudspeaker unit 91. The feedback microphone 80 is thus located closer to the ambient noise actually perceived at the entrance of the user's ear canal.The time difference between the sound detected by the loudspeaker unit 91 (including the anti-sound) and the actual arrival of this sound at the entrance of the ear canal is smaller. This results in the sound signal detected by the feedback microphone 80 (ambient noise + sound from the loudspeaker unit 91) exhibiting a stronger temporal and phase correlation with the sound ultimately to be eliminated at the entrance of the ear canal. Based on this signal, which is closer to the "real" signal, the digital signal processor can generate an anti-sound whose arrival time at the entrance of the ear canal can be more precisely matched to the ambient noise to be eliminated, thus enabling more precise noise cancellation.

[0097] Furthermore, the sound inlet of the feedback microphone 80 is oriented towards the sound output side of the loudspeaker unit 91. In an active noise cancellation system, a primary function of the feedback microphone 80 is to detect sound inside the loudspeaker unit 91 near the user's ear canal entrance, including sound generated by the loudspeaker unit itself (both the music being played and the anti-noise used for noise cancellation). The orientation of the feedback microphone 80's sound inlet towards the sound output side of the loudspeaker unit 91 means that the feedback microphone 80 "hears" the sound transmitted directly from the loudspeaker unit 91 most directly and with priority. This ensures that the feedback microphone 80 can detect the signal emitted by the loudspeaker unit 91, particularly the anti-noise, most accurately, thus improving the precision and effectiveness of the noise cancellation.

[0098] As in Fig. 4, Fig. 6 and Fig. As shown in Figure 12, in some embodiments the loudspeaker unit 91 and the feedback microphone 80 are arranged essentially coaxially. This means that the direction of sound propagation and the physical mounting position of the loudspeaker unit 91 and the feedback microphone 80 are roughly on the same axis. This allows the feedback microphone 80 to accurately detect the sound signal generated by the loudspeaker unit 91, which enables more precise phase compensation and improved noise reduction in active noise cancellation systems, particularly in the suppression of high-frequency noise.

[0099] Furthermore, along the axial direction of the sound output channel 12a, the protective area 921, the feedback microphone 80, and the loudspeaker unit 91 are arranged sequentially and coaxially. The coaxial arrangement makes the protective mesh 92, the loudspeaker unit 91, and the feedback microphone 80 more compact and reduces unnecessary structures.

[0100] This design saves considerable interior space and offers more possibilities for the arrangement of other electronic components (such as the electrical connecting element 95, the first reinforcement plate 93, the second reinforcement plate 94, etc.).

[0101] As in Fig. 7 and Fig. As shown in Figure 8, the headphones 100 in some embodiments also include a feedforward microphone (FF MIC) 70. The feedforward microphone 70 is primarily responsible for predicting and detecting external ambient noise. The ambient noise signal it detects is sent to the processor, which generates an anti-noise signal that is then played back by the headphones 100 to suppress the noise. Its noise-canceling process focuses more on prediction and active intervention. Many people wear the headphones 100 while sleeping to block out ambient noise such as the hum of an air conditioner or nighttime traffic noise, in order to fall asleep faster or achieve deeper sleep. Therefore, good noise-canceling performance is a core requirement for sleep headphones 100.

[0102] In the prior art, for the active noise cancellation required in in-ear sleep headphones 100, the feedforward microphone 70 is typically placed within the housing structure of the headphones 100. To realize the sound capture function, this feedforward microphone 70 is equipped with a pickup opening (a tone hole) 112A2. A common arrangement is to position this tone hole 112A2 on the outer surface of the headphones 100 that faces away from the user's ear when the headphones are worn. If the user sleeps in a side position, this outer surface facing away from the ear can be in close contact with bedding such as pillows or a mattress. Since the tone hole 112A2 of the feedforward microphone 70 is located in this area, it is easily blocked or completely covered by the aforementioned bedding.Blocking or closing the tone hole 112A2 directly results in the feedforward microphone 70 being unable to capture an effective ambient noise signal, thus disabling the active noise cancellation function based on that signal.

[0103] As in Fig. 1 and Fig. As shown in Figure 7, in these embodiments, to solve the aforementioned problem, the main housing 11 comprises a main area 111A and a projection 112A. The main area 111A is the main part of the main housing 11, forms the main contour and volume of the earphone 100, provides the basic shape and structural support for the entire earphone 100, and accommodates the necessary internal components. The main area 111A has a flat structure, which is crucial for the slim profile of the entire earphone 100. It helps to reduce the thickness of the earphone 100 in the direction perpendicular to the auricle, thereby reducing pressure on the ear and surrounding areas when worn, especially when sleeping on one's side, and increasing wearing comfort.

[0104] The projection 112A extends from one side of the main area 111A. Specifically, the projection 112A is designed so that, when the user puts on the headphones 100, it lies outside the user's crus helicis and extends towards the user's antihelix. This design prevents an increase in the thickness of the main housing 11, allowing the main area 111A to maintain a relatively thin design. The laterally positioned projection 112A does not exert direct, surface pressure in the main load direction of the lateral position, effectively avoiding the pronounced pressure sensation that occurs with conventional headphones 100 due to an excessively thick housing when lying on one's side, and thus improving the user's wearing experience in a supine position (especially on their side).

[0105] It should be noted that the main area 111A and the projection 112A together form a continuous, one-piece structure that jointly defines the assembly space 11a. That is, the projection 112A is not a separate part from the main area 111A. This integrated structural design divides the ear housing 10 into functionally distinct, but structurally coherent, areas.

[0106] Furthermore, the outer edge of the protrusion 112A and the outer edge of the main area 111A blend seamlessly into one another. The outer skin 911 of the earphone 100 has no sharp edges or abrupt steps from the main area 111A to the protrusion 112A. 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 and reduce pressure and friction on the auricle, the crus helicis, or the surrounding skin. Additionally, the smooth transition helps the entire earpiece 10 form a more continuous, aerodynamically efficient contour. This design helps the earphone 100 fit more closely and naturally to the complex curvature of the ear, particularly in the area outside the crus helicis.

[0107] The feedforward microphone 70 is located at least partially within the projection 112A. It is understood that "at least partially" refers to two cases: In the first case, the entire feedforward microphone 70 is located completely and entirely within the structure of the projection 112A. In the second case, the feedforward microphone 70 is not located entirely within the projection 112A, but rather part of it is housed in the main area 111A, while another part extends into and is positioned within the projection 112A.

[0108] Since a certain amount of space remains between the main area 111A, the sound outlet 12, and the antihelix when the headphones are worn, using this space for the projection 112A provides a suitable mounting location for the feedforward microphone 70 without significantly increasing the overall volume of the headphones 100 or altering their basic wearing method (such as in-ear headphones). This means that the projection 112A forms a local "raised area" or "step" relative to the main area 111A in the direction of the antihelix, thus creating a height difference. Furthermore, a surface of the projection 112A facing the sound outlet 12 has a tone hole 112A2 corresponding to the feedforward microphone 70. That is, the tone hole 112A2 is located on a side of the headphones 100 that, when worn and lying on one's side, faces away from the area subjected to the sound.This allows it to avoid the directly affected area, so that the feedforward microphone can still keep the acoustic path to the outside environment open. Even in the side sleeping position, the tone hole 112A2 is less easily blocked, and the feedforward microphone 70 can continuously and effectively capture ambient noise signals via the tone hole 112A2.

[0109] Furthermore, the central axis of the tone hole 112A2 and the central axis of the main area 111A are arranged at an angle to each other and extend outwards from the main area 111A. Since the feedforward microphone 70 is typically used to capture ambient noise or speech in conversations, an inclined tone hole opening 112A2 can adjust the main direction of sound capture by the microphone to better capture sound from a specific direction (such as from the front or from the outside). In addition, internal structures of the earphone 100 (such as cavities, sound outlet 12) can generate resonances or reflected sound. An inclined tone hole 112A2 can prevent the microphone from directly receiving these internal sound waves, thus reducing the influence of resonances on the capture quality.

[0110] As in Fig. 1, Fig. 7 and Fig. As shown in Figure 8, the assembly space 11a comprises a first assembly space 111A1 and a second assembly space 112A1, which are connected to each other. The first assembly space 111A1 is located in the main area 111A. The second assembly space 112A1 is located in the projection 112A. It is understood that the tone hole 112A2 is connected to the second assembly space 112A1. The electrical control board 96 is flat. Part of it is located in the first assembly space 111A1, and another part projects into the second assembly space 112A1. This allows the electrical control board 96 to better adapt to the spatial arrangement inside the headphones 100. This design optimally utilizes the space of the main area 111A and the protrusion 112A, achieving a compact design for the Headphone 100. It allows the Headphone 100 to accommodate the necessary electronic components and meet functional requirements while maintaining a small volume.The feedforward microphone 70 is mounted on the electrical control board 96. This shortens the signal transmission path and reduces interference during signal transmission, thus improving signal integrity and quality and ensuring that the feedforward microphone 70 can more accurately capture external ambient noise. Furthermore, the shorter distance between the feedforward microphone 70 and the signal processing on the electrical control board 96 significantly reduces signal processing delay, which is particularly important for the real-time noise reduction function and can improve the immediacy and accuracy of the noise reduction effect.

[0111] Since the main area 111A and the projection 112A are not two independent, separate components, but rather a coherent, seamlessly overlapping whole, a structured protrusion of a certain thickness naturally forms in the area where the main area 111A extends and transitions into the projection 112A. The inner wall of this protrusion forms part of the second mounting space 112A1. This protrusion can provide support for the electrical control board 96, and the feedforward microphone 70 is accordingly positioned on the portion of the electrical control board 96 that is supported by this protrusion.

[0112] Furthermore, mounting the feedforward microphone 70 on the electrical control board 96 provides a more stable attachment, reduces potential wobbling of the feedforward microphone 70 inside the headphones 100, and increases its durability and reliability. During the assembly process of the headphones 100, this reduces the number of assembly steps and connection points, thus decreasing the likelihood of assembly errors and increasing production efficiency.

[0113] As in Fig. 8 and Fig. As shown in Figure 9, the headphone 100 also includes an ear wing 20. The ear wing 20 covers part of the outer surface of the main area 111A. Ear wings 20 are typically made of soft material such as silicone or rubber, which reduces pressure on the ear and increases wearing comfort.

[0114] The ear wing 20 comprises a mounting sleeve 21 and a contact area 22, which are connected to each other. The mounting sleeve 21 encloses a portion of the main area 111A, which is located in the user's conchal cavity when the headphones 100 are worn, and serves to secure the main area 111A. This design ensures that the headphones 100 do not easily slip or fall out when worn, especially during activities such as sports or side sleeping. The contact area 22 is spaced apart from the projection 112A in the thickness direction of the main area 111A. The contact area 22 is designed to rest elastically against the user's antihelix when the headphones 100 are worn. Through contact with the antihelix, it provides the headphones 100 with an additional point of support, thus improving their stability when worn.The elastic design of the contact area 22 adapts to the ear shapes of different users, reducing pressure on the antihelix and increasing wearing comfort. Furthermore, the elasticity of the contact area 22 automatically adjusts the pressure against the ear, ensuring a stable fit even during varying activities.

[0115] Furthermore, when wearing the headphones 100, the contact area 22 is located on an inner side of the projection 112A, and the contact area 22 and the projection 112A are spaced apart. This allows for optimal use of the space on both sides in the thickness direction of the main area 111A, making the arrangement in the headphones 100 more compact and the overall volume smaller. The tone hole 112A2 is located on the side of the projection 112A facing the contact area 22. This means that when the contact area 22 rests against the user's antihelix, there is a gap between the contact area 22 and the projection 112A. This design ensures that even when sleeping on one's side, pillows or other bedding do not directly block the tone hole 112A2, thus preventing clogging.

[0116] The first mounting chamber 111A1 is directly connected to the sound output channel 12a, while the second mounting chamber 112A1 is connected to the sound output channel 12a via the first mounting chamber 111A1. A rear chamber tuning port 112A3, connected to the second mounting chamber 112A1, is also located on a surface of the projection 112A facing the sound outlet 12. Understandably, the rear chamber tuning port 112A3 connects the outside air to the rear chamber of the loudspeaker unit 91 and regulates the air pressure on the rear of the vibration system to control the degree of acoustic coupling between the rear chamber and the outside air. This acts like an "outlet" or "relief valve" for the sound waves on the rear of the vibration system, thus altering the pressure and acoustic load acting on the rear of the diaphragm.

[0117] Furthermore, the rear chamber tuning port 112A3 and the tone hole 112A3 are located adjacent to each other on the same side of the projection 112A. This means that when the user wears the device in a side-lying position, the rear chamber tuning port 112A3 rests on the projection 112A, reducing the risk of obstruction. If the rear chamber tuning port 112A3 were obstructed, the pressure on the rear of the vibration system could not be properly dissipated and regulated, disrupting the originally designed acoustic balance. This could lead to a deterioration of bass response. Additionally, it shares a relatively stable acoustic environment with the tone hole 112A2, improving stability in sound capture and tone tuning.

[0118] Furthermore, in the thickness direction of the main area 111A, the vertical shadow cast by the posterior chamber tuning port 112A3 lies outside the vertical shadow cast by the support area 22. This maximizes the patency of the posterior chamber tuning port 112A3 and prevents obstruction. It reduces the risk of the posterior chamber tuning port 112A3 becoming blocked during wear; regardless of how the user adjusts the wearing position, the posterior chamber tuning port 112A3 remains connected to the outside air as much as possible.

[0119] As in Fig. 8, Fig. 9, Fig. 10 and Fig. As shown in Figure 11, the headphones 100 in some embodiments include a charging area 40. The charging area 40 is used in conjunction with a battery 90. To ensure the battery 90's operating time, its volume is correspondingly larger. Most of the bulky battery 90 is housed in the more spacious first assembly area 111A1. A portion of the battery 90 protrudes into the sound output channel 12a. The battery 90 is electrically connected to the electrical control board 96 to supply it with power. The battery 90 and the electrical control board 96 are arranged in the thickness direction of the main area 111A. The battery 90 has battery pins that extend toward and are inserted into the electrical control board 96 to provide power. The charging area 40 is located on the circumferential side of the battery 90.The charging area 40 can be electrically connected to the battery 90 via the electrical control board 96 and serves to charge the battery 90. The charging area 40 is the interface or induction device for charging the battery 90. It can be physical contacts (e.g., USB Type-C, Lightning, or special wireless charging contacts) or a wireless charging coil. Its function is to receive external power (usually from the charging case or a directly connected charging cable) and transfer it safely and efficiently to the battery 90 for storage. It is crucial for the repeated use and maintenance of the battery life of the headphones 100.

[0120] As in the Fig. 8, Fig. 9, Fig. 10 and Fig. As shown in Figure 11, in the embodiments, the charging area 40 is a wireless charging contact, and the earphone 100 also includes a magnet 50. The charging area 40 and the magnet 50 are arranged adjacent to each other in the first mounting space 111A1 and are visible from the outside on the outer surface of the main area 111A. When the earphone 100 is placed in the charging case for charging, the case typically also contains corresponding magnets 50. The magnet 50 on the earphone 100 and the magnet 50 in the charging case attract each other, automatically drawing the earphone 100 into the designated charging position in the case. This magnetic alignment ensures that the charging area 40 of the earphone 100 is precisely and quickly aligned with the charging contacts or the wireless charging coil in the case each time, thus guaranteeing charging reliability and eliminating the need for manual alignment by the user.

[0121] Furthermore, the charging area 40 and the magnet 50 are located on the circumferential side of the main area 111A. The skin around the user's ear and pillows can exert pressure on the ear housing 10. If the charging area 40 (typically metal contacts) or the magnet 50 (even small magnets) were located in the pressure zone, their hard surfaces could press directly against the skin and cause discomfort or even pain. This solution places them on the circumferential side of the main area 111A, away from the main pressure zone, so that when sleeping on the side, primarily the soft ear wing 20, and not the hard charging contacts or magnets, comes into contact with the user's ear. This noticeably reduces pressure and discomfort when sleeping on the side and significantly improves wearing comfort.

[0122] Furthermore, the charging area 40 and the magnet 50 are located on the side of the main area 111A opposite the projection 112A. Placing the charging-related components (charging area 40 and magnet 50) on the relatively opposite side can reduce their potential influence on the acoustic environment inside the projection 112A. For example, charging contacts or magnets could cause minor electromagnetic interference or physical obstructions; a separate arrangement helps to ensure the purity and accuracy of the sound capture by the feedforward microphone 70.

[0123] As in the Fig. 8 and Fig. As shown in Figure 9, in some embodiments the main housing 11 comprises a front housing part 111B and a rear housing part 112B, which are connected to each other. Dividing the main housing 11 into two separately manufactured parts, which are then joined together (e.g., by means of snap-fits, screws, or adhesive), enables a good seal. Furthermore, internal structures (such as the electrical control board 96, the battery 90, etc.) can be installed in the cavity formed by the front housing part 111B and the rear housing part 112B.

[0124] The rear housing part 112B is designed as a flat, lid-like structure. Its main function is to close the rear of the front housing part 111B and, together with it, to protect the sensitive electronic and acoustic components inside. The front housing part 111B forms the main part, creating the first mounting space 111A1 and the second mounting space 112A1, and allows the electronic and acoustic components to be housed within the front housing part 111B.

[0125] The sound outlet 12 and the rear housing part 112B are each attached to opposite sides of the front housing part 111B in the direction of its thickness. The sound outlet 12 can be molded as a single piece with the front housing part 111B, which reduces the number of connection points and increases structural stability. Furthermore, the front housing part 111B and the rear housing part 112B together form the main area 111A and the projection 112A, which ensures the structural integrity and stability of the headphone shape. The projection 112A and the main area 111A, as a single unit, are less susceptible to deformation or damage during use.

[0126] With reference to Fig. 8 and Fig. 9 The front case part 111B comprises a front case underside 111B1 and a front case side surface 111B2. The front case underside 111B1 and the front case side surface 111B2 are distinct areas of the outer surface of the front case part 111B. The front case underside 111B1 is connected to the outer surface of the sound outlet 12, and the front case side surface 111B2 is connected to the outer surface of the rear case part 112B. The front case side surface 111B2 extends from an end of the front case underside 111B1 that is away from the sound outlet 12 and is angled relative to the front case underside 111B1. The charging area 40 and the magnet 50 are both attached to the front case side surface 111B2.

[0127] When the headphones 100 are worn by the user, the surface of the front housing part 111B that primarily comes into contact with the human ear is the front housing underside 111B1. The front housing side surface 111B2, which is angled relative to the front housing underside 111B1, comes into less frequent contact with the ear.

[0128] Understandably, the charging area 40 and the magnet 50 are typically hard structural components that can easily cause discomfort to the user when pressure is applied to the ear. In these embodiments, the arrangement of the charging area 40 and magnet 50 on the front housing side surface 111B2 prevents them from coming into contact with the ear when the headphones 100 are worn, thus increasing the wearing comfort of the headphones 100.

[0129] The ear wing 20 can enclose the front housing's underside 111B1 and side surface 111B2. Recesses are provided in the area corresponding to the charging area 40 and the magnet 50, exposing both to the outside. This allows the earphone 100 to engage with the corresponding structures of the charging case when placed inside. Additionally, a portion of the front housing's side surface 111B2, where the charging area 40 and the magnet 50 are located, is convex. This creates a slight depth and recess in the charging case's charging position. The convexity of the charging area 40 on the front housing's side surface 111B2 allows for a better fit with the corresponding part of the charging case, resulting in a more stable connection and reducing poor contact caused by wobbling.

[0130] Optionally, the front housing side surface 111B2 can have a locking groove 111B3 to secure the ear wing 20 and ensure a stable fit of the ear wing 20 to the front housing part 111B. The locking groove 111B3 can, but need not, be annular. The ear wing 20 can be slipped over the front housing part 111B and snapped into the locking groove 111B3. The locking groove 111B3 can be located near the rear end of the front housing side surface 111B2 to facilitate the assembly of the ear wing 20. In other embodiments, the locking groove 111B3 can be located at other positions on the front housing side surface 111B2.

[0131] As in Fig. As shown in Figure 8, the headphones 100 also include an antenna 60. The antenna 60 is the component of the headphones 100 responsible for wireless communication and, under the control of the electronic control board 96, can exchange electromagnetic waves with the outside world. The headphones 100 can transmit signals to the outside world via the antenna 60. If an external device (e.g., a mobile phone) detects this signal and pairing is successful, the headphones 100 can establish a wireless connection to the external device and subsequently transmit data, such as audio data, to it.

[0132] The electrical control board 96 has contacts 961 for the electrical connection to the antenna 60. Accordingly, the rear housing part 112B has micro-drillings that are connected to the second mounting space 112A1. The antenna 60 can be connected to the contacts 961 via these micro-drillings. The contacts 961 are located in the second mounting space 112A1, with the electrical control board 96 resting securely against the wall of the second mounting space 112A1. This ensures a stable spatial position and orientation of the contacts 961 on the circuit board. The connection between the antenna 60 and the contacts 961 is more secure and precise, which reduces potential contact problems or signal interference due to shocks or vibrations, thus increasing the long-term reliability of the electrical connection.

[0133] The antenna 60 is mounted on a surface of the rear housing part 112B facing away from the sound outlet 12. Compared to prior art solutions where the antenna 60 is located in the first mounting space 111A1 or the second mounting space 112A1, placing the antenna 60 on the outer surface of the rear housing part 112B in these embodiments reduces the shielding or reflection of radio signals by internal metal parts, plastic housings, or vibration systems, thereby improving the performance of the antenna 60. Sufficient vertical clearance is maintained between the antenna 60 and other components, preventing signal attenuation or damage due to excessive proximity. An antenna 60 mounted externally on the rear housing part 112B does not require space inside the ear housing 10, which contributes to the miniaturization of the headphone design 100.

[0134] Furthermore, when worn, the Antenna 100 does not come into contact with the user's ear, which reduces pressure on the ear in side sleeping scenarios and prevents the skin of the ear from absorbing antenna waves, thus improving high-frequency performance.

[0135] Antenna 60 can be an LDS antenna. LDS antenna technology, officially called "Laser Direct Structuring," is a technology that uses lasers to structure conductive trace patterns directly onto a housing. This technology controls the laser movement via computer, directing the laser onto the housing and quickly activating conductive trace patterns to form a metal antenna on the housing surface through chemical deposition.

[0136] In other embodiments, the antenna 60 of the headphones 100 is not limited to the design described above. For example, the antenna 60 can be an FPC antenna, a PCB antenna, a spring antenna, a ceramic chip antenna, etc.

[0137] Although antennas 60 have a certain degree of durability, they can be damaged by accidental drops, friction, or scratches against other hard objects. To address this issue, in some embodiments, the outer walls of the rear housing part 112B incorporate an additional layer of flexible material. This flexible layer covers the antenna 60. It absorbs and dampens external shocks and friction, thus protecting the antenna 60 and preventing scratches, damage, or impacts. Furthermore, flexible material layers generally offer a better tactile feel, being softer and warmer, which significantly improves the comfort of the headphones and reduces the sensation of a foreign object.

[0138] Specifically, the flexible material layer can be a silicone layer, a thermoplastic polyurethane layer, or a rubber layer that provides a soft tactile feel.

[0139] As in Fig. As shown in Figure 12, in some embodiments the headphones 100 further includes a fabric mesh 97. The fabric mesh 97 is attached to the inside of the protective mesh 92 and covers the openings 92a in the protective mesh 92. The size and dimensions of the protective mesh 92 are adapted to the fabric mesh 97 and cover one side of the protective mesh 92 facing the feedback microphone 80. It is understood that the main function of the fabric mesh 97 is to further block the ingress of dust and fine particles into the interior of the headphones 100 in order to protect the internal components—the feedback microphone 80 and the speaker unit 91. This reduces the risk of failure due to dust accumulation or the ingress of foreign bodies and extends the service life of the headphones 100.

[0140] It is understood that the openings 92a of the protective mesh 92 are larger compared to the mesh of the fabric mesh 97. The main function of the protective mesh 92 is to prevent larger foreign objects from entering the interior of the headphones 100, and it possesses a certain mechanical strength to withstand external impact forces. The fabric mesh 97 has several smaller meshes and offers finer protection. The combination of the protective mesh 92 and the fabric mesh 97 provides multi-stage protection and ensures that the internal components of the headphones 100 are adequately protected in various application scenarios. The protective mesh 92 blocks larger foreign objects and liquids, while the fabric mesh 97 continues to prevent dust and fine particles from entering. This multi-stage protection concept can effectively reduce the risk of failure due to dust and foreign objects.

[0141] The fabric mesh 97 can consist of non-woven fabric, nylon mesh or polyester fiber mesh, which has good air permeability and dust protection properties while allowing sound transmission.

[0142] Furthermore, the protective mesh 92, the protective mesh 92, and the flexible circuit board housing the feedback microphone 80 undergo modular processing, meaning they are processed and assembled together. Integrating these three components at an early stage of manufacturing eliminates the need for subsequent assembly of the individual parts during the final assembly of the headphones 100. This can reduce the complexity and time required for downstream assembly and simplify the final assembly process.

[0143] As in Fig. 7 and Fig.As shown in Figure 8, in some embodiments the headphones 100 further include an ear cap 30. The ear cap 30 is fitted over the sound outlet 12. The ear cap 30 has a through-opening 30b opposite the sound outlet 12b. The sound outlet 12 has an annular projection 121. The ear cap 30 has an annular recess 31 corresponding to the annular projection 121. The interaction of the annular projection 121 and the annular recess 31 engages the ear cap 30 with the sound outlet 12. This effectively secures the ear cap 30 to the sound outlet 12 and prevents it from accidentally detaching or shifting during use (e.g., during sports activities or head movements).

[0144] The earplug (size 30) is typically made of soft silicone or similar materials. The soft earplug provides a more comfortable fit and reduces direct irritation of the ear canal. Earplugs in various sizes can adapt to the ear canal sizes of different users, further improving comfort and fit.

[0145] When the headphones 100 are worn on the ear and the earcup 30 fits snugly, a pressure difference can occur between the inside and outside. This pressure difference can exert some pressure on the eardrum and lead to discomfort. Additionally, the pressure can cause impact on the components in the sound outlet 12 and potentially damage them, for example, by deforming the diaphragm of the speaker unit 91, which would in turn negatively affect the sound quality of the headphones 100.

[0146] To solve this problem, the inner wall of the ear cup 30 has a pressure relief groove 30a. A pressure relief channel 10a, connected to the pressure relief groove 30a, runs along the outer wall of the sound outlet 12 and the main area 111A. The pressure relief channel 10a runs in the axial direction of the sound outlet 12, penetrates the annular projection 121, and extends to a portion of the front housing side surface 111B2, where the charging area 40 is attached. It is understood that the pressure relief channel 10a is connected to the outside. When a pressure difference arises between the inside and outside, air from the ear canal can flow through the speaker opening 30b into the pressure relief groove 30a and begins to flow outwards. Along the pressure relief channel 10a at sound outlet 12 and main area 111A, it is connected to the outside world.This reduces fatigue or discomfort from wearing the garment, which can be caused by pressure problems.

[0147] In the description of the present invention, it is understood that terms such as "top," "bottom," "left," "right," or similar expressions indicating directions or positional relationships are based on the directions or positional relationships illustrated in the drawings. This terminology serves solely to facilitate and simplify the description of the present invention. It does not indicate, nor does it imply, that the described devices or components must necessarily have a specific orientation, be constructed in a specific orientation, or be operated in a specific orientation. Consequently, the terms used in the drawings to describe positional relationships serve only as examples and should not be interpreted as limitations.For the expert in this field, the specific meanings of the above-mentioned terms can be understood depending on the specific circumstances.

[0148] Furthermore, the terms "first," "second," etc., serve only descriptive purposes and should not be interpreted as implying relative importance or specifying the number of technical features listed. Features designated as "first," "second," etc., may explicitly or implicitly include one or more of these features. In the description of the invention, "several" means at least two, for example, two, three, etc., unless expressly defined otherwise.

[0149] In the description of the invention, unless expressly defined or limited otherwise, terms such as "assemble", "connect", "fasten", "fix", etc. are to be understood broadly.

[0150] For example, it may be a fixed connection, a detachable connection, or an integration; a mechanical connection or an electrical connection; a direct connection or an indirect connection via a medium; a connection between two elements or an interaction between two elements, unless expressly limited. For a person skilled in the art, the specific meanings of the above terms in the invention may be understood according to the specific circumstances.

[0151] It should be noted that when an element is described as being "attached" or "attached" to another element, it may be located directly on top of that element, or intermediate elements may be present. Similarly, when an element is described as being "connected" to another element, it may be directly connected to it, or intermediate elements may be present. Terms used in this document, such as "vertical," "horizontal," "top," "bottom," "left," "right," and similar expressions, are for illustrative purposes only and do not represent a specific embodiment.

[0152] The foregoing content represents only specific embodiments. However, the scope of protection is not limited thereto. Any person skilled in the art in this field can easily conceive of modifications or substitutions within the technical scope disclosed by the present application that should fall within the scope of protection. Therefore, the scope of protection of the present invention should be governed by the scope of protection of the claims.

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