headphones

Abstract

One set of headphones (100), comprising: - an ear housing (10) comprising a main housing (11) and a sound outlet (12) connected to the main housing (11), wherein the interior of the main housing (11) has a mounting space (11a) and the sound outlet (12) has a sound output channel (12a) connected to the mounting space (11a) and a sound outlet opening (12b) connected to the sound output channel (12a); - a protective net (92) connected to the sound outlet (12) and arranged at the sound outlet opening (12b); and - a feedback microphone (80) arranged on the protective net (92).

Description

Technical field

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

[0002] Headphones with active noise cancellation (ANC) incorporate a feedback microphone. This microphone detects the sound signals entering the user's ear and monitors the sound in real time. It provides feedback to the headphones' noise cancellation function, enabling effective suppression of ambient noise.

[0003] However, related technologies typically provide a mounting structure for attaching the feedback microphone inside the headphone housing. This increases the space required for the mounting structure, which in turn leads to a larger overall volume of the headphones. Summary

[0004] A headphone according to claim 1 is provided with the aim of optimizing the structure of the headphone in order to be able to miniaturize it further.

[0005] According to one aspect, a headphone comprises: an ear housing comprising a main housing and a sound outlet connected to the main housing; wherein a mounting space is defined inside the main housing; the sound outlet has a sound output channel connected to the mounting space and a sound outlet opening connected to the sound output channel; a protective mesh connected to the sound outlet and arranged at the sound outlet opening; and a feedback microphone arranged at the protective mesh.

[0006] With the headphones according to the invention, the feedback microphone no longer needs to be housed in the internal mounting space of the main housing, but is instead positioned on the protective mesh above the sound outlet (the sound nozzle). This frees up the space that would otherwise have been required in the main housing for the feedback microphone and its associated wiring. The main housing, as the primary support structure of the headphones, directly influences the reduction of the overall dimensions through the optimization of its interior. Relocating the feedback microphone therefore allows for a corresponding reduction in the volume of the main housing and creates opportunities for a more compact headphone design.

[0007] Furthermore, the feedback microphone is mounted directly onto the protective mesh, cleverly utilizing the mesh's existing structure as a support and mounting point. This eliminates the need to design and install a separate, specialized bracket or complex mounting structure for the feedback microphone. As a result, the headphones can be made more compact, significantly contributing to achieving its miniaturization goal.

[0008] The headphones may further include an electrical control board arranged in the mounting space, wherein the protective mesh is preferably a metal mesh and / or the protective mesh is electrically connected to the electrical control board, preferably to be grounded via the electrical control board.

[0009] The headphones may further include an electrical connecting element, wherein preferably the feedback microphone is electrically connected to the electrical control board via the electrical connecting element and / or the protective mesh is electrically connected to the electrical control board via the electrical connecting element, preferably to be grounded via the electrical control board.

[0010] The headphones may further include an amplification plate, wherein the amplification plate is preferably arranged in the sound output channel and / or connected to the protective mesh, and / or the amplification plate is located on a side of the electrical connecting element that is facing away from the sound output opening, and / or the feedback microphone is located on a side of the electrical connecting element that is facing the sound output opening.

[0011] The sound outlet can have a limiting groove on an inner wall of the sound outlet channel at one end near the sound outlet opening and / or the protective mesh can be embedded in the limiting groove and connected to the groove wall of the limiting groove.

[0012] The protective net can include: a protective area that is net-shaped and / or covers the sound outlet opening and / or a connecting area that is arranged around the edge of the protective area and / or embedded in the limiting groove.

[0013] A surface of the protected area can be flush with a surface of the sound outlet.

[0014] The connection area may include a flange connected to the protective area and / or the flange may be formed with a plurality of teeth evenly spaced along its circumference, which are embedded in the limiting groove and / or connected to the groove wall of the limiting groove.

[0015] The protective net can include: a support area that is folded (hemmed) from the connection area towards the electrical connection element, with the reinforcement plate preferably attached to the support area, and / or at least one or each of the protective area, the connection area and the support area can enclose a recording space and the feedback microphone can be located in the recording space.

[0016] The support area can comprise two support feet opposite each other in the radial direction of the protected area and / or the reinforcement plate can comprise two support part plates, each arranged opposite the two support feet, the support part plates preferably being connected to the support feet.

[0017] The headphones may further include a loudspeaker unit, wherein preferably the loudspeaker unit is arranged in the sound output channel and / or the loudspeaker unit is located on a side of the feedback microphone facing the main housing.

[0018] The sound inlet opening of the feedback microphone can be oriented towards the sound output side of the loudspeaker unit.

[0019] The feedback microphone and / or the loudspeaker unit can be spaced apart along an axial direction of the sound output channel.

[0020] The headphones may also have an antenna, which is preferably an FPC antenna, a PCB antenna, a spring antenna or a ceramic patch antenna.

[0021] The headphones may also include a fabric mesh, wherein the fabric mesh is attached to the inside of the protective mesh and / or covers the protective mesh. Brief description of the drawing

[0022] 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. Figure 6 is another schematic representation of the structure from Fig. 1 from a different angle (without ear wings and ear cap). Fig. Figure 7 is a schematic cross-sectional view along line CC in Fig. 6. Fig. Figure 8 is an enlarged schematic representation of area D in Fig. 7. Fig. Figure 9 is a schematic representation of a protective net according to some embodiments. Fig. Figure 10 is another schematic representation of the structure from Fig. 1 from a different perspective. Fig. 11 is an exploded view of the in Fig. 10 shown structures. Fig. 12 is another exploded view of the in Fig. 10 shown structures. Fig. Figure 13 is another schematic representation of the internal structure of the in Fig. 10 shown structures. Fig. 14 is an exploded view of the in Fig. 13 shown structure. Fig. 15 is another schematic representation of the internal structure of the in Fig. 10 shown structures. Fig. 16 is an exploded view of the in Fig. 15 shown structure. Fig. Figure 17 is a schematic representation of the internal structure of a headphone according to some further embodiments. Fig. 18 is an exploded view of the in Fig. 17 shown structure. Fig. Figure 19 is a schematic top view of a part of a headphone according to some embodiments. Fig. Figure 20 is a schematic top view of a part of a headphone according to other embodiments. Fig. Figure 21 is a schematic top view of a part of a headphone according to further embodiments. Fig. Figure 22 is a schematic top view of a part of a headphone according to further embodiments. Reference symbol:

[0023] 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 Positioning 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 Through-hole; 31 Ring-shaped recess; 40 Charging area; 50 Magnet; 60 Antenna; 70 Feedforward microphone; 80 Feedback microphone; 90 Battery; 91 Speaker unit; 911 Housing; 912 Power connector pin; 913 Support; 9131 Support arm; 9132 Limiting arm; 9132a Support groove; 92 Protective mesh; 92a Through-hole; 921 Protective area; 922 Connection area; 9221 Flange; 923 Support area;9231 Support foot; 94 Reinforcement plate; 941 Connecting plate; 942 Support plate; 95 Electrical connecting element; 951 First electrical connecting element; 951a Recess; 952 Second electrical connecting element; 96 Electrical control board; 96 Contact points; 97 Fabric mesh; 98 Protective lacquer.; Detailed description of the embodiments

[0024] To more clearly illustrate the purpose, technical solution, and advantages of the invention, it 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 present invention and not to limit it.

[0025] Headphones (also called earphones, headsets, or earpieces) 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's development, wireless headphones are still a relatively new phenomenon. Wireless headphones are headphones that utilize Bluetooth technology to enable a wireless connection. Users can transmit audio data wirelessly to a mobile phone or other devices. The main advantages of wireless headphones are the absence of bothersome cables and their ease of portability and use, making them particularly suitable for use during sports activities.

[0026] 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.

[0027] In today's world, where wireless headphones are increasingly prevalent, consumers have higher expectations for headphone comfort. A smaller size can not only reduce pressure on the ear canal and improve comfort during extended wear, but also allows headphones to be more discreetly concealed in the ear, thus satisfying users' dual demands for aesthetics and portability. Therefore, the design of miniaturized headphones has become a key competitive factor in the current headphone market and a major driver of technological advancement in the industry.

[0028] In the prior art, the basic structure of headphones typically comprises a housing (such as the main casing) that contains internal electronic components, as well as a sound outlet that directs the sound to the user's ear. Also included is a feedback microphone (FB MIC) housed within the casing; that is, a microphone designed to capture sound in the ear canal or the headphone cavity to enable active noise cancellation. Due to the presence of the feedback microphone and its associated structures, further compression of the housing's interior is limited, making it difficult to make the headphones smaller and lighter.

[0029] 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. Inside it is space for accommodating electronic components and forming acoustic structures. The ear housing 10 comprises 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 defined within the main housing 11. The sound outlet 12 is attached 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 and has an internal sound output channel 12a that is connected to the mounting space 11a. The sound outlet 12 also has a sound outlet opening 12b that 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.

[0030] 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.

[0031] 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.

[0032] With reference to Fig. 1, Fig. 2, Fig. 3 and Fig. In this embodiment, the headphones 100 also include a protective mesh 92 and a feedback microphone 80. The protective mesh 92 is connected to the sound outlet 12 and covers the sound outlet opening 12b to prevent foreign matter (such as dust or dirt) from entering the interior of the ear housing 10 through the sound outlet opening 12b. The feedback microphone 80 is located in the sound output channel 12a. The feedback microphone 80 is designed to detect sound near the opening of the user's ear canal or within the cavity of the headphones 100, primarily for the active noise cancellation system. In these embodiments, the feedback microphone 80 no longer needs to be located in the inner mounting space 11a of the main housing 11, but is instead mounted on the protective mesh 92 above the sound outlet 12. This frees up the space that would originally have had to be reserved in the main housing 11 for the feedback microphone 80 and its connecting cables.Since the main housing 11 forms the primary support structure of the headphones 100, optimizing its interior directly impacts the reduction of its overall dimensions. Therefore, relocating the feedback microphone 80 allows for a corresponding reduction in the volume of the main housing 11, thus creating the conditions for a compact design of the headphones 100.

[0033] The feedback microphone 80 remains 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 embodiments integrated several components (protective mesh 92, FB MIC) and connected 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 inside the sound outlet 12 contributes to the miniaturization of the headphones 100, especially in the confined space of the sound outlet 12, and enables more efficient integration of the microphones and protective structures required for noise cancellation without significantly increasing the overall dimensions.

[0034] In some embodiments, the headphones 100 further include an electronic control board 96. 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.

[0035] 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.

[0036] Therefore, in these embodiments, the protective mesh 92 is electrically connected to the electrical control board 96 in order to be grounded via it. The protective mesh 92 can be made of metal or a conductive material; for example, the protective mesh 92 is specifically a metal mesh that can conduct electrostatic charges well. That is, the protective mesh 92 is designed as a conductive material that collects electrostatic charges and conducts them to the grounding lead 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 short-circuiting the feedback microphone 80 mounted on the protective mesh 92 and thus ensuring effective protection of the microphone component against electrostatic damage.This increases the electrostatic resistance of the headphones 100 and the overall lifespan of the product.

[0037] 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.

[0038] 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.

[0039] The headphones 100 also include an electrical connecting element 95. The electrical connecting element 95 is designed to transmit the audio signals detected by the feedback microphone 80 from the latter to the corresponding signal processing connections on the electrical control board 96.

[0040] In these embodiments, the feedback microphone 80 is electrically connected to the electrical control board 96 via the electrical connecting element 95 for grounding. The electrical connecting element 95 can be 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 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.

[0041] 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.

[0042] In these embodiments, the protective mesh 92 is electrically connected to the electrical control board 96 via the electrical connecting element 95 in order to be grounded through it. 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 electrical connecting element 95. The charge flows through the electrical connecting element 95 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.

[0043] 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.

[0044] As in the Fig. 3 and Fig. As shown in Figure 4, in some embodiments the headphones 100 further includes a reinforcement plate 94. The 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 reinforcement plate 94. The 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.

[0045] In practical applications, the electrical connection is usually made by soldering. The electrical connection element 95 is a flexible printed circuit board. Flexible printed circuit boards and the protective mesh (typically metal) expand and contract at different rates due to temperature fluctuations. This difference creates persistent mechanical stresses at the solder joints. This leads to the solder joints (tin spots) easily developing cracks, known as "tin cracks," during the soldering process or in use. This phenomenon of tin cracking impairs the stability of the electrical connection and the performance and reliability of the headphones 100.

[0046] Therefore, in these embodiments, the reinforcement plate 94 is electrically connected to the electrical connector 95. The reinforcement plate 94 supports a portion of the electrical connector 95 on which the feedback microphone 80 is mounted. The reinforcement plate 94 is located on the side of the electrical connector 95 facing away from the sound outlet 12b. The 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.

[0047] Furthermore, the amplification plate 94 is electrically connected to the electrical connecting element 95 to connect the protective mesh 92 to the grounding lead of the electrical control board 96. This means that the amplification 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 amplification plate 94 and from there to the electrical connecting element 95. The electrical connecting element 95 then conducts the electrostatic charge to the grounding lead of the electrical control board 96, where it is discharged via the grounding lead to the electrostatic protection circuit on the electrical control board 96.

[0048] Furthermore, the feedback microphone 80 is located on the side of the electrical connecting element 95 facing the sound outlet opening 12b. This allows for optimal use of the space between the amplification plate 94 and the protective mesh 92, preventing 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. Additionally, its placement on the side of the 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.

[0049] Specifically, the 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 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.

[0050] 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.

[0051] As in the Fig. 5, Fig. 6, Fig. 7 and Fig. As shown in Figure 8, 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 embedded in 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.

[0052] Furthermore, the protective net 92 comprises a protective area 921 and a connecting area 922. The protective area 921 is net-shaped and covers 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 is embedded in the limiting groove 12c and connected to its groove wall. 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.

[0053] As in the Fig. 5, Fig. 8 and Fig. As shown in Figure 9, the connection area 922 specifically comprises a circumferential flange 9221 connected to the protective area 921. The flange 9221 is arranged (in an annular shape) around the circumference of the protective area 921 and extends towards one side facing away from the sound outlet opening 12b. The flange 9221 is formed with a plurality of teeth (serrations) evenly spaced along its circumference. The teeth are embedded in the limiting groove 12c and connected to its groove wall. The tooth structure increases the contact area and friction between the flange 9221 and the groove wall of the limiting groove 12c. In addition, the tooth structure forms a similar locking effect with the groove wall of the limiting groove 12c, which anchors it more firmly in the groove wall and prevents the protective mesh 92 from loosening, detaching, or rotating due to vibrations, external forces, or minimal movements during use.Compared to a smooth 9221 flange, the serrations offer a stronger locking force.

[0054] The protective mesh 92 also includes a support area 923 connected to an end of the connection area 922 that is located away from the protective area 921. The support area 923 extends in the sound output channel 12a from the connection area 922 away from the limiting groove 12c and towards the centerline of the sound output channel 12a. The support area 923 is folded from the connection area 922 towards the electrical connection element 95. The reinforcement plate 94 is attached to the support area 923. A portion of the support area 923 connected to the reinforcement plate 94 is arranged parallel to the protective area 921. Therefore, the support area 923 as a whole resembles a structure that extends from the connection area 922, initially roughly axially, then bends inwards (towards the center) halfway along its length, and finally provides a connection surface parallel to the reinforcement plate 94. This provides the reinforcement plate 94 with an ideal, stable mounting base.This parallel design ensures that the reinforcement plate 94 can distribute stresses evenly and work better with the support area 923 and the entire protective net 92 to maximize the reinforcement effect.

[0055] The surface of the protective area 921 is flush with the surface of the sound outlet 12. This allows the protective mesh 92 to cover the area of ​​the sound outlet 12b more completely, without any exposed edges. It can adapt better to the entrance of the ear canal, increasing wearing comfort and reducing the sensation of a foreign body. If the protective area 921 were to protrude from or be recessed into the surface of the sound outlet 12, a step would be created between the protective area 921 and the sound outlet 12, which could easily trap hair or accumulate dust. The flush design reduces this possibility.

[0056] With reference to Fig. 5, Fig. 8 and Fig. The protective area 921, the connection area 922, and the support area 923 enclose a receiving chamber 12e. The feedback microphone 80 is located in the receiving chamber 12e. The electrical connecting element 95 is arranged between the feedback microphone 80 and the amplification plate 94. The receiving chamber 12e provides the feedback microphone 80 with a relatively enclosed and protected environment and prevents it from being damaged by direct impacts or pressure during assembly, transport, or use.

[0057] Specifically, the support area 923 comprises two support feet 9231, arranged radially opposite each other in the direction of the protective area 921. Accordingly, the reinforcement plate 94 comprises a connecting plate 941 and two support plates 942. The connecting plate 941 is electrically connected to the electrical connector 95 and supports the feedback microphone 80. The two support plates 942 are each connected to the two ends of the connecting plate 941 and extend to both sides to be connected to the two support feet 9231. The paired arrangement of the two support feet 9231 and the two support plates 942 forms a stable support structure that effectively prevents the 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.

[0058] As in the Fig. 5, Fig. 8 and Fig. As shown in Figure 9, to further increase the stability of the support area 923 on the inner wall of the sound output channel 12a of the sound outlet 12, a positioning groove 12d connected to the limiting groove 12c is defined. Part of the structure of the support area 923 engages in the positioning groove 12d. This can increase the fastening accuracy of the support area 923 to 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 positioning groove 12d provides a defined mounting position for the support area 923, which can reduce quality problems due to improper assembly.

[0059] Continuing the above, two positioning grooves 12d are provided corresponding to the two support feet 9231. The two positioning 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 part of the support area 923 that engages in the positioning 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 in the limiting groove 12c.

[0060] Accordingly, the protective net 92 is connected to the reinforcement plate 94 via the support area 923, thus preventing the 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.

[0061] It should be noted that the positioning 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 positioning 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 positioning groove 12d. In this way, the support area 923 can slide relatively easily and smoothly into the positioning groove 12d and ultimately anchor itself in the predetermined position.

[0062] As in the Fig. 3 and Fig. As shown in Figure 4, in some embodiments the headphones 100 also include a loudspeaker unit 91. 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. The loudspeaker unit 91 is attached to the sound outlet 12 and is located in the sound output channel 12a. The sound output channel 12a is the main path by which the sound is transmitted from the loudspeaker unit 91 to the ear canal. Placing the loudspeaker unit 91 in the sound output channel 12a ensures that the sound propagates along the most direct path. Furthermore, using this space for the loudspeaker unit 91 allows for a more compact arrangement of the internal structures, which contributes to controlling the overall size of the headphones 100.

[0063] Furthermore, 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.

[0064] 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 entrance to the user's ear canal, including sound generated by the loudspeaker unit 91 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, especially the anti-noise, most accurately, thus improving the precision and effectiveness of the noise cancellation.The feedback microphone 80 detects the sound that has already passed through the internal speaker processing of the headphones 100 (anti-noise reproduction), i.e., the noise that actually remains in the ear canal. Based on the residual noise detected by the feedback microphone, the processor adjusts the anti-noise generation in real time to achieve better noise cancellation. Its function is primarily focused on feedback and correction.

[0065] In some embodiments, the feedback microphone 80 and the loudspeaker unit 91 are spaced apart along the axial direction of the sound output channel 12a. 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, enabling more precise phase compensation and improved noise reduction in active noise cancellation systems, particularly in the suppression of high-frequency noise.

[0066] 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 to 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).

[0067] Furthermore, along the axial direction of the sound output channel 12a, the protective enclosure 921, the feedback microphone 80, and the loudspeaker unit 91 are arranged sequentially and coaxially. The coaxial arrangement makes the protective enclosure 92, the loudspeaker unit 91, and the feedback microphone 80 more compact and reduces unnecessary structures. This design saves considerable interior space and offers more possibilities for the arrangement of other electronic components (such as the electrical connector 95, the amplification plate 94, etc.).

[0068] As in the Fig. 1, Fig. 10 and Fig. As shown in Figure 11, 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.

[0069] 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 tone hole 112A2. A common arrangement is to position this tone hole 112A2 on the outer surface of the headphones 100, which, when worn, faces away from the user's ear. If the user sleeps on their side, 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.

[0070] As in the Fig. 1, Fig. 10 and Fig. As shown in Figure 11, 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 during wear, especially when sleeping on one's side, and increasing wearing comfort.

[0071] 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 experienced by conventional headphones 100 due to an excessively thick housing when lying on the side, and thus improving the user's wearing experience in a supine position (especially on their side).

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] With reference to the Fig. 1, Fig. 10 and Fig. 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 defined within the main area 111A. The second assembly space 112A1 is defined within 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 within 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.

[0078] 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.

[0079] 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.

[0080] As in Fig. 11 and Fig. As shown in Figure 12, the headphone 100 further comprises 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.

[0081] 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.

[0082] 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.

[0083] As in Fig. 13 and Fig. As shown in Figure 14, the headphones 100 in some embodiments include a battery 90 and a charging area 40. To ensure the battery's operating time, its volume is correspondingly larger. The larger battery 90 is housed in the more spacious first assembly area 111A1 and 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 the electrical control board 96 and are inserted into it 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 consist of physical contacts (e.g.,This involves a USB Type-C, Lightning, or dedicated 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 for storage. It is crucial for repeated use and maintaining the battery life of the headphones.

[0084] In these 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 located 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.

[0085] 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.

[0086] 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.

[0087] As in Fig. 1 and Fig. As shown in Figure 11, 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 "relieving valve" for the sound waves on the rear of the vibration system, thus changing the pressure and acoustic load acting on the rear of the diaphragm.

[0088] 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.

[0089] 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.

[0090] As in Fig. 11 and Fig. As shown in Figure 12, 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.

[0091] 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.

[0092] 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.

[0093] As in Fig. 11 and Fig. As shown in Figure 12, 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 regions 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.

[0094] 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. 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.

[0095] As in Fig. 11 and Fig. As shown in Figure 12, 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 the charging area 40 and the magnet 50 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. Consequently, the charging position in the charging case has a certain depth and indentation. 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.

[0096] 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.

[0097] With reference to Fig. 11 and Fig. 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.

[0098] 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.

[0099] 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.

[0100] Furthermore, when the antenna 60 is in place, it 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.

[0101] Antenna 60 can be an LDS antenna. LDS antenna technology, short for "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.

[0102] 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 patch antenna, etc.

[0103] 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.

[0104] Specifically, the flexible material layer can be a silicone layer, a thermoplastic polyurethane layer, or a rubber layer that provides a soft tactile feel.

[0105] As in Fig. 15 and Fig. As shown in Figure 16, in some embodiments 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 in the magnetic field. The vibration system comprises a voice coil and a diaphragm, the voice coil being the part that excites the diaphragm to vibrate.

[0106] 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.

[0107] In contrast to the prior art, where 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 soldered to the solder pads of the PCBA and the other end to the main control board, the loudspeaker unit 91 in these embodiments dispenses with the PCBA because the PCBA takes up space and operation in the confined sound output channel 12a is difficult. Instead, the power connection pins 912 are exposed directly on the housing 911, as shown in Fig. 17 and Fig. Figure 18 shows that in the first embodiment, the electrical connecting element 95 extends from the feedback microphone 80 to the power connection pins 912, is electrically connected to them, and then extends further into the mounting space 11a, where it is electrically connected to the electrical control board 96. The electrical connecting element 95 is a one-piece, extending flexible printed circuit board. As shown in Fig. 15 and Fig. As shown in Figure 16, in the second embodiment the electrical connecting element 95 comprises a first electrical connecting element 951 and a second electrical connecting element 952. The second electrical connecting element 952 electrically connects the feedback microphone 80 and the electrical control board 96. The first electrical connecting element 951 is connected to the power connection pins 912 and electrically connected to the electrical control board 96 via the second electrical connecting element 952. Both the first electrical connecting element 951 and the second electrical connecting element 952 are flexible printed circuit boards.

[0108] In both the first and second embodiments, the original PCBA of the loudspeaker unit 91 was removed, and the power connection pins 912 were exposed directly on the housing 911. Flexible printed circuit boards (PCBs) can be bent and arranged more flexibly. They are thinner than PCBAs and can free up more space. The flexibility of flexible PCBs allows them to conform to the irregular interior of the ear housing 10; they can even move with the vibration or deformation of the loudspeaker unit 91, which reduces the connection stress caused by vibration and further increases the long-term reliability of the connection.

[0109] By eliminating the space originally required in the loudspeaker unit 91 for the PCBA board and its solder points, this volume and height are completely eliminated. This not only directly reduces the height profile of the loudspeaker unit 91 itself, making it flatter, but also shortens the axial height of the sound outlet 12, allowing it to be designed more compactly and reducing the sensation of sound penetration into the ear canal.

[0110] Specifically, as in Fig. 17 and Fig. Figure 18 shows that, in the first embodiment, the flexible printed circuit board is manufactured as a single, extending piece. Only a few connection steps are required during assembly, reducing assembly cost. The integrated design minimizes impedance changes and signal loss in the signal transmission path, potentially improving transmission efficiency and the sound quality of the audio signal. As shown in Fig. 15 and Fig. As shown in Figure 16, in the second embodiment the electrical connecting element 95 is divided into two parts, so that the first electrical connecting element 951 and the second electrical connecting element 952 can be positioned independently of each other according to the actual space requirements. The first electrical connecting element 951 can be placed close to the power connection pins 912 to reduce signal loss, while the second electrical connecting element 952 can optimize the connection path to the electrical control board 96. If the feedback microphone 80 or the connection area 922 of the power connection pins 912 needs to be replaced, only the corresponding flexible circuit board needs to be replaced without having to redesign the entire circuit.

[0111] With reference to Fig. 15 and Fig. In some embodiments, protective lacquer 98 is additionally applied at the connection point between the electrical connecting element 95 and the power connection pins 912. The protective lacquer 98 is applied to a side of the electrical connecting element 95 facing away from the housing 911. Although the solder joints of the power connection pins 912 and the electrical connecting element 95 establish the electrical connection, this connection point can be subjected to mechanical stresses (e.g., bending, pressure, vibration) during normal use of the headphones 100.After curing, the protective lacquer 98 firmly bonds the solder joints, the power connection pins 912, and part of the first electrical connecting element 951 together, forming a single unit. This significantly increases the mechanical strength of the connection and prevents the solder joints from cracking or the pins from loosening due to vibration or stress, thus improving the long-term reliability of the connection. Furthermore, the cured protective lacquer 98 forms an insulating layer that prevents the solder joints or power connection pins 912 from accidentally coming into contact with other conductive parts and causing short circuits.

[0112] Since the inner diaphragm of the loudspeaker unit 91 moves back and forth during operation, causing pressure variations within the housing, a completely closed housing would create pressure that hinders the diaphragm's movement, restricts its freedom of movement, and thus impairs sound quality. Therefore, the housing 911 of the loudspeaker unit 91 also features a loudspeaker tuning port. This port effectively equalizes the pressure inside and outside the housing. This design prevents pressure buildup from hindering the diaphragm's movement, allowing it to move more freely and improving the clarity and dynamic range of the sound.

[0113] Corresponding to the loudspeaker tuning port, the electrical connecting element 95 also has a recess 951a which corresponds to the position of the loudspeaker tuning port. This allows the electrical connecting element 95 to bypass the position of the loudspeaker tuning port, so that it can be flexibly positioned near the loudspeaker tuning port without impairing its function.

[0114] As in Fig. 17 and Fig. As shown in Figure 18, the feedback microphone 80 does not necessarily have to be mounted over the protective mesh 92. In some embodiments, the loudspeaker unit 91 also includes a support 913 connected to the housing 911. The support 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 attached to the support 913, which places it very close to the sound source (the 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. Furthermore, the direct integration of the feedback microphone 80 into the loudspeaker unit 91 increases the component integration density.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.

[0115] Specifically, two supports 913 are arranged radially opposite each other on the housing 911. The support 913 comprises a connected support arm 9131 and a limiting arm 9132. The support arm 9131 is connected to the housing 911 and extends towards the sound outlet opening 12b. The limiting arm 9132 has a support groove 9132a. The two support plates 942 of the reinforcement plate 94 can each rest in the two support grooves 9132a. By mounting the feedback microphone 80 on the reinforcement plate 94 instead of directly on the support 913, the weight of the feedback microphone 80 and any micro-vibrations can be better distributed, thus preventing deformation or damage to the support 913 due to long-term stress or vibration.The two supports 913 allow the weight of the reinforcement plate 94 and the feedback microphone 80 to be distributed more evenly, which increases the structural stability and deformation resistance of the entire assembly.

[0116] It should be noted that, as in the Fig. 19, Fig. 20 and Fig. As shown in Figure 21, the support 913 of the invention is not limited to the forms described above. In some embodiments, the number of support sub-elements can also be one or more than two, for example, but not limited to, four, eight, etc. Several support sub-elements can be arranged in pairs spaced apart and each located on opposite sides of the feedback microphone 80 in order to jointly realize the mounting of the feedback microphone 80 on the sound-emitting side of the loudspeaker unit 91. The several support sub-elements can be arranged symmetrically in pairs to improve the mounting stability of the feedback microphone 80. Of course, the locations of the several support sub-elements are not limited to this. The space between each pair of support sub-elements can be used for the passage of the sound emitted by the loudspeaker unit 91.

[0117] In other embodiments, the shape of the limiting arm 9132 is not limited to this. For example, an end of the limiting arm 9132 that is away from the support arm 9131 can also be plate-shaped.

[0118] As in Fig. As shown in Figure 22, the limiting arm 9132 can be designed as a rod-shaped plate to facilitate connection with the second reinforcing plate 94. In some embodiments, the width of the limiting arm 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 limiting arm 9132 can also be designed to other dimensions as required. The limiting arm 9132 can be designed in other shapes, for example, cylindrical.

[0119] As in the Fig. 15 and Fig. As shown in Figure 16, 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.

[0120] 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.

[0121] The 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.

[0122] 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.

[0123] As in the Fig. 1 and Fig.As shown in Figure 11, 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 the ear cap 30 from accidentally detaching or shifting during use (e.g., during sports activities or head movements).

[0124] 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.

[0125] 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.

[0126] 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 opening 30b into the pressure relief groove 30a and begins to flow outwards. Along the pressure relief channel 10a at the sound outlet 12 and the 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.

[0127] In the description of the 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 depicted in the drawings. This terminology serves solely to facilitate and simplify the description of the 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 limiting the invention.For the expert in this field, the specific meanings of the above-mentioned terms can be understood depending on the specific circumstances.

[0128] 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.

[0129] In the description of the invention, “several” means at least two, for example two, three, etc., unless expressly defined otherwise.

[0130] 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. For example, they may refer to a permanent 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 aforementioned terms in the invention can be understood according to the specific circumstances.

[0131] 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.

[0132] The foregoing content presents only specific embodiments of the invention. However, the scope of protection of the invention 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 invention that should fall within the scope of protection. Therefore, the scope of protection of the invention should be governed by the scope of protection of the claims.

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