An in-ear earphone with a rotary adjustment head

Abstract

The utility model relates to the field of earphone, and disclose an earphone with rotary adjusting head, including earphone handle, earphone casing, screw rod type adjusting knob, telescopic adjusting sleeve, sound production subassembly and earplug part etc. structure, earphone handle and earphone casing form the communication cavity, built -in earphone wire and signal wire, screw rod type adjusting knob can drive telescopic adjusting sleeve sliding through fine pitch thread and coarse pitch thread cooperation, realize the accurate fine adjustment and quick regulation of earplug part extension length, adapt to different user ear canal depth, earplug part is spherical elastic structure, through the annular recess elasticity clamping of inside earplug fixed ring and telescopic adjusting sleeve, realize detachable connection, convenient replacement to adapt to different ear canal, in addition, earphone contains left and right ear identification block, and earphone wire junction part integrates multiple plug-in ends, can directly adapt to different interface equipment, need not adapter, has improved wearing comfort, individualized adaptation ability and equipment versatility.

Description

Technical Field

[0001] This utility model relates to the field of in-ear headphones, specifically an in-ear headphone with a rotating adjustment head. Background Technology

[0002] Headphones are portable audio devices that convert electrical signals into sound signals. They are widely used in daily communication, music listening, office work, and study. In-ear headphones are a popular choice due to their small size, excellent noise isolation, and direct sound transmission. However, different users have different ear canal structures, including ear canal depth and curvature. Traditional in-ear headphones often have a fixed design for the angle and extension length of the sound-emitting end, making it difficult to adapt to diverse ear canal shapes and easily leading to problems with improper fit. Therefore, in-ear headphones with rotating adjustment heads are needed to adapt to different users' ear canals through adjustment, thereby improving the stability and comfort of wearing them.

[0003] Traditional in-ear headphones lack adjustment features, often featuring a fixed, non-adjustable structure that cannot precisely adjust to the user's ear canal depth and angle. This leads to some users experiencing them slipping out easily, and prolonged use can cause ear canal pressure and pain, severely impacting the user experience. Furthermore, traditional in-ear headphones typically have fixed ear tips, making it difficult to easily change to fit different ear canal sizes. This not only limits personalized fit but can also reduce sound isolation due to a loose fit, affecting sound quality. Additionally, traditional headphones often have a single type of audio plug, only compatible with devices with specific interfaces, requiring adapters to connect to other devices, increasing costs and inconvenience, and limiting their applicability. Therefore, we propose an in-ear headphone with a rotating adjustment head. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an in-ear headphone with a rotating adjustment head, thus solving the aforementioned problems.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution: an in-ear headphone with a rotating adjustment head, comprising: The device comprises an earphone stem, an earphone shell, a screw-type adjustment knob, a telescopic adjustment sleeve, a sound-generating component, and an earbud portion. The earphone stem is integrally connected to the bottom end of the earphone shell. The earphone stem is hollow inside with an opening at the bottom, through which an earphone cable is slidably connected. The earphone shell is also hollow inside, forming a communicating cavity with the earphone stem. The left side wall of the earphone shell has a sliding hole, and the right side wall has an assembly hole. The earphone shell is threadedly connected to the screw-type adjustment knob through the assembly hole. The screw-type adjustment knob has anti-slip grooves evenly distributed on the outer periphery of its head, and fine and coarse threads distributed axially on the outer periphery of its rod. A telescopic adjustment sleeve is provided at one end of the screw-type adjustment knob rod. The telescopic adjustment sleeve is sleeved on the outer wall of the screw-type adjustment knob and threaded. The telescopic adjustment sleeve slides through a sliding hole on the left side wall of the earphone housing. The telescopic adjustment sleeve is hollow inside. The sound-generating component is fixedly installed on the left inner wall of the telescopic adjustment sleeve. The wiring terminal of the sound-generating component is connected to the earphone cable through a signal wire. An earplug portion is provided at the left end of the telescopic adjustment sleeve. The inner side wall of the earplug portion is provided with an earplug fixing ring. The earplug portion is fixedly sleeved on the outer wall of the telescopic adjustment sleeve by the earplug fixing ring.

[0006] Preferably, a marker block is provided in the middle section of the outer wall of the earphone stem. The marker block is fixed by an embedding method, and its surface is pressed with "L" and "R" character markings to distinguish the left and right ears of the earphone.

[0007] Preferably, the earphones include a first earphone unit and a second earphone unit with mirror-symmetrical structure, which are connected by an earphone cable to form a binaural wearing structure; the outer wall of the earphone stem of the first earphone unit is provided with an "L" marking block, and the outer wall of the earphone stem of the second earphone unit is provided with an "R" marking block; the junction of the earphone cables of the first earphone unit and the second earphone unit is fixedly connected with multiple plug terminals, which include, but are not limited to, a 3.5mm standard audio plug, a Type-C audio plug, and a Lightning audio plug.

[0008] Preferably, the telescopic adjusting sleeve has limit rings at both ends of its outer wall. The limit rings are square rings that are fixedly sleeved with the telescopic adjusting sleeve to limit the sliding of the telescopic adjusting sleeve in the sliding hole on the left side wall of the earphone housing. A buffer pad is fixedly installed on the surface of the limit ring.

[0009] Preferably, the left port of the telescopic adjustment sleeve is provided with a dustproof net, and the dustproof net has multiple sets of completely penetrating circular holes. The dustproof net is fixed to the inner wall of the left port of the telescopic adjustment sleeve by snap-fit ​​and completely covers the sound output end of the sound-generating component.

[0010] Preferably, the fine thread and the coarse thread are distributed sequentially along the axial direction of the screw-type adjustment knob. The fine thread is fixed on the side closer to the head, and the coarse thread is fixed on the side farther from the head. The inner wall of the telescopic adjustment sleeve near the right port is fixed with an internal thread that matches the coarse thread. The inner wall of the mounting hole on the right side wall of the earphone housing is fixed with an internal thread that matches the fine thread, which is used for fine thread fine adjustment to drive coarse thread rapid adjustment.

[0011] Preferably, the earplug part has an internally hollow spherical elastic structure, and two sets of earplug fixing rings are distributed at intervals on its inner sidewall. The earplug fixing ring is a ring-shaped protrusion, and two ring-shaped grooves are provided at the corresponding positions on the outer wall of the left end of the telescopic adjustment sleeve. The earplug fixing ring and the ring groove are elastically clamped together for detachable connection between the earplug part and the telescopic adjustment sleeve.

[0012] Preferably, the anti-slip grooves are distributed circumferentially along the head of the screw-type adjustment knob, and their openings are U-shaped. The edges of the anti-slip grooves are rounded, and the spacing between adjacent grooves is equal.

[0013] Compared with the prior art, this utility model provides an in-ear headphone with a rotating adjustment head, which has the following advantages: These in-ear headphones with a rotating adjustment knob utilize a combination of fine and coarse threads in a screw-type adjustment knob to achieve precise micro-adjustment and rapid adjustment. This allows users to flexibly adjust the earbud extension length according to their ear canal depth, making it easier to find a comfortable and snug fit, significantly improving wearing stability and adaptability. The earbuds feature a detachable connection through a flexible clamping structure with dual earbud retaining rings and a retractable adjustment sleeve with an annular groove. This allows users to easily change earbuds of different materials or sizes according to their ear canal size and wearing habits, facilitating cleaning and replacement of worn earbuds, maintaining hygiene, and enhancing the headphones' durability and personalization capabilities. The headphone cable connector integrates multiple plugs, including a 3.5mm standard audio plug, a Type-C audio plug, and a Lightning audio plug, directly adapting to playback devices with different interfaces without the need for additional adapters. This greatly improves device versatility and lowers the barrier to entry and additional costs for users. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the structure of this utility model; Figure 3 This is an exploded view of the structure of this utility model; Figure 4 This is a schematic diagram of the extended earplug portion of the present invention.

[0015] In the diagram: 1. Earphone stem; 2. Identifier block; 3. Earphone shell; 4. Screw-type adjustment knob; 5. Fine thread; 6. Coarse thread; 7. Telescopic adjustment sleeve; 8. Limiting ring; 9. Dustproof mesh; 10. Sound-generating component; 11. Signal wire; 12. Earbud part; 13. Earbud retaining ring; 14. Earphone cable; 15. Anti-slip groove. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-4 An in-ear headphone with a rotating adjustment head, comprising: The headphone stem 1, headphone housing 3, screw-type adjustment knob 4, telescopic adjustment sleeve 7, sound-generating component 10, and earplug part 12 are integrated. The headphone stem 1 is integrally connected to one bottom end of the headphone housing 3. The headphone stem 1 is hollow inside with an opening at the bottom. The headphone cable 14 is slidably connected inside the opening. The headphone housing 3 is hollow inside and forms a communicating cavity with the headphone stem 1. The left side wall of the headphone housing 3 has a sliding hole and the right side wall has an assembly hole. The headphone housing 3 is threadedly connected to the screw-type adjustment knob 4 through the assembly hole. The head of the screw-type adjustment knob 4 is evenly provided with anti-slip grooves 15 on the outer periphery, and its rod is provided with fine thread 5 and coarse thread 6 distributed along the axial direction on the outer periphery. A telescopic adjustment sleeve 7 is provided at one end of the screw-type adjustment knob 4. The telescopic adjustment sleeve 7 is sleeved on the outer wall of the screw-type adjustment knob 4 and threaded. The telescopic adjustment sleeve 7 is slidably connected to the sliding hole on the left side wall of the earphone housing 3. The telescopic adjustment sleeve 7 is hollow inside. The sound-generating component 10 is fixedly installed on the left inner wall of the telescopic adjustment sleeve 7. The wiring terminal of the sound-generating component 10 is connected to the earphone cable 14 through the signal wire 11. An earplug portion 12 is provided at the left end of the telescopic adjustment sleeve 7. An earplug fixing ring 13 is provided on the inner side wall of the earplug portion 12. The earplug portion 12 is fixedly sleeved on the outer wall of the telescopic adjustment sleeve 7 by the earplug fixing ring 13.

[0018] Furthermore, an identification block 2 is provided in the middle of the outer wall of the earphone stem 1. The identification block 2 is fixed by an inlay method, using a high-strength buckle to cooperate with the groove of the outer wall of the earphone stem to ensure that it will not fall off easily after long-term use. The surface of the identification block is pressed with "L" and "R" characters to distinguish the left and right ears of the earphone. The characters are made of embossed process and can withstand daily friction. The identification block is made of wear-resistant ABS material. In addition to intuitively distinguishing the left and right ears, it can also help users with poor eyesight or in dark environments to wear the earphone quickly through the difference in touch, avoiding sound field imbalance caused by wearing the wrong earphone.

[0019] Furthermore, the headphones include a first and a second earphone unit with mirror-symmetrical structure, which are connected by an earphone cable 14 to form a binaural wearing structure. The mirror-symmetrical design ensures balanced weight distribution between the left and right units, reducing pressure on one ear. The outer wall of the earphone stem 1 of the first earphone unit is marked with an "L" and the outer wall of the earphone stem 1 of the second earphone unit is marked with an "R". The junction of the earphone cables 14 of the first and second earphone units is fixedly connected to multiple plugs. The outer shell of the plugs is made of aluminum alloy, which is lightweight and drop-resistant. The plugs include, but are not limited to, a 3.5mm standard audio plug, a Type-C audio plug, and a Lightning audio plug. Each plug uses gold-plated contacts to reduce signal transmission loss, and the base of the plug is provided with a soft rubber sleeve to reduce wire breakage caused by frequent bending.

[0020] Furthermore, limit rings 8 are provided at both ends of the outer wall of the telescopic adjustment sleeve 7. The limit rings 8 are square rings that are fixedly sleeved with the telescopic adjustment sleeve 7. The square structure is adapted to the inner wall of the sliding hole on the left side wall of the earphone shell, which can prevent the telescopic adjustment sleeve from sliding excessively and avoid disengagement. A buffer pad is fixedly installed on the surface of the limit ring 8. The buffer pad is made of silicone. In addition to buffering the impact between the limit ring and the earphone shell, the buffer pad can also fill the gap to reduce friction noise during adjustment, and at the same time prevent the limit ring from making hard contact with the earphone shell and causing scratches.

[0021] Furthermore, a dustproof net 9 is provided on the left side port of the telescopic adjustment sleeve 7. The dustproof net 9 has multiple sets of fully penetrating circular holes distributed in a honeycomb pattern. The dustproof net 9 is fixed to the inner wall of the left side port of the telescopic adjustment sleeve 7 by snap-fit. The snap-fit ​​structure is that the elastic protrusions on the edge of the dustproof net cooperate with the slots on the inner wall of the sleeve. It can be disassembled by hand and completely covers the sound output end of the sound-generating component 10. The dustproof net is made of stainless steel, which can not only block earwax and dust from entering the sound-generating component, but also, due to the reasonable mesh density design, will not cause significant attenuation of the propagation of mid-to-high frequency sound. At the same time, it can be disassembled and cleaned regularly to maintain transparency.

[0022] Furthermore, the fine thread 5 and the coarse thread 6 are distributed sequentially along the axial direction of the screw-type adjustment knob 4. The fine thread 5 is fixed on the side closer to the head, and the coarse thread 6 is fixed on the side farther from the head. The inner wall of the telescopic adjustment sleeve 7 near the right port is fixed with an internal thread that matches the thread of the coarse thread 6. The inner wall of the mounting hole on the right side wall of the earphone housing 3 is fixed with an internal thread that matches the thread of the fine thread 5, which is used for fine thread 5 to drive the coarse thread 6 to adjust quickly. The surfaces of the two threads are oxidized to enhance wear resistance, and the joint adopts a smooth transition design to avoid jamming during adjustment. The precise adjustment of the fine thread allows the coarse thread to complete the length adjustment to adapt to the difference in ear canal depth, taking into account both efficiency and precision.

[0023] Furthermore, the earplug portion 12 has an internally hollow spherical elastic structure, made of medical-grade silicone material with good biocompatibility. Two sets of earplug fixing rings 13 are spaced apart on its inner sidewall. The earplug fixing rings 13 are annular protrusions, and two annular grooves are provided at the corresponding positions on the outer wall of the left end of the telescopic adjustment sleeve 7. The earplug fixing rings 13 are elastically clamped to the annular grooves for detachable connection between the earplug portion 12 and the telescopic adjustment sleeve 7. The spherical structure has excellent fit to the ear canal contour, which can enhance the sound insulation effect. The double clamping design of the two sets of fixing rings can reduce the earplug part's detachment rate. At the same time, the inner wall of the groove is polished to reduce wear on the silicone fixing rings during disassembly.

[0024] Furthermore, the anti-slip grooves 15 are distributed circumferentially along the head of the screw-type adjustment knob 4, and their openings are U-shaped. The edges of the anti-slip grooves 15 are rounded, and the spacing between adjacent grooves is equal. The curvature of the U-shaped grooves is adapted to the curvature of an adult's fingertip, which can increase friction and allow for stable operation even when the hands are sweaty. The rounded corner design prevents scratching the fingers when rotating, and the equal spacing ensures uniform force distribution during rotation, making the adjustment feel smoother.

[0025] Structural Description: Earphone stem 1: It is the holding and connecting part of the earphone, which is integrally connected to one end of the bottom of the earphone shell 3. It is hollow inside and has an opening at the bottom. The earphone cable 14 is slidably connected in the opening and forms a communicating cavity with the earphone shell 3, providing a space for the earphone cable 14 and the signal wire 11, while also making it convenient for the user to hold and operate. Marker Block 2: Located in the middle of the outer wall of the earphone stem 1, it is fixed by embedding and is made of wear-resistant material. The surface is embossed with "L" and "R" characters to clearly distinguish the left and right ears. The character design is easy to identify by touch, helping users to wear the earphone quickly and accurately and avoid sound field imbalance. Earphone housing 3: The interior is hollow and forms a communicating cavity with the earphone stem 1. The left side wall has a sliding hole and the right side wall has an assembly hole. It is threadedly connected to the screw-type adjustment knob 4 through the assembly hole, providing support for the sliding of the telescopic adjustment sleeve 7 and the installation of the screw-type adjustment knob 4. It is the core load-bearing structure. Screw-type adjustment knob 4: The outer periphery of the head has an anti-slip groove 15, and the rod is provided with fine thread 5 and coarse thread 6, which are threaded to the mounting hole of the earphone shell 3. By rotating, it drives the telescopic adjustment sleeve 7 to move. It is the core driving component for realizing the position adjustment of the earbud part 12, and has both anti-slip and adjustment functions. Fine thread 5: Located on the head side of the screw-type adjustment knob 4, it matches the thread inside the mounting hole of the earphone housing 3. The small thread pitch allows for a small amount of advance and retreat of the screw-type adjustment knob 4, providing precise fine-tuning of the earbud part 12 and ensuring adjustment accuracy. Coarse thread 6: On the side of the screw-type adjustment knob 4 away from the head, it matches the internal thread of the telescopic adjustment sleeve 7. The thread pitch is large, and when rotated, it can drive the telescopic adjustment sleeve 7 to slide quickly, so as to realize a wide range of rapid adjustment of the earpiece part 12 and improve the adjustment efficiency. Telescopic adjustment sleeve 7: It is fitted onto the outer wall of the screw-type adjustment knob 4 and its thread is engaged with it. It slides on the sliding hole on the left side wall of the earphone housing 3. It is hollow inside. The sound-generating component 10 is fixed on the inner wall of the left side. The left end is connected to the earplug part 12. It slides with the knob to realize the position adjustment of the earplug part 12. Limiting ring 8: It is a square ring that is fixedly sleeved on both ends of the outer wall of the telescopic adjustment sleeve 7. It cooperates with the sliding hole of the earphone shell 3 to limit the sliding range of the sleeve and prevent excessive extension and retraction. The surface buffer pad can reduce impact, reduce noise, and avoid wear of parts. Dustproof net 9: Located at the left port of the telescopic adjustment sleeve 7, it is fixed by snap-fit. It has multiple through circular holes inside, which completely cover the sound output end of the sound-generating component 10. It can block earwax and dust from entering the sound-generating component 10, while not affecting sound transmission. It can be disassembled and cleaned. Sound-generating component 10: It is fixedly installed on the inner left side of the telescopic adjustment sleeve 7 and is the core component for sound output. The terminal is connected to the headphone cable 14 through the signal wire 11 to convert the electrical signal into a sound signal and move with the sleeve to adapt to the position of the ear canal. Signal wire 11: connects the terminal of the sound-generating component 10 to the headphone wire 14, is placed in the cavity connecting the headphone stem 1 and the headphone shell 3, can move with the telescopic adjustment sleeve 7, stably transmits audio signals, and ensures normal sound output; Earplug 12: It is a hollow spherical elastic structure with an earplug fixing ring 13 on the inner wall. It is connected to the telescopic adjustment sleeve 7 through the fixing ring to fit the ear canal, enhance wearing comfort and sound insulation. The material is soft and adaptable to different ear canals. Earplug retaining ring 13: Two sets of annular protrusions on the inner side wall of the earplug part 12, which are elastically clamped to the annular groove on the outer wall of the left end of the telescopic adjustment sleeve 7, so as to realize the detachable connection between the earplug part 12 and the sleeve, which is convenient for replacement and the connection is stable. Headphone cable 14: It is slidably connected to the bottom opening of the headphone stem 1, and is connected to the sound-generating component 10 through the signal wire 11. The left and right headphone units are connected through it to form a dual-ear structure. The junction has multiple plug terminals to adapt to different device interfaces and transmit audio signals. Anti-slip groove 15: Distributed around the head of the screw-type adjustment knob 4, the groove opening is U-shaped, the groove edge has rounded corners and the spacing is even, which can increase the friction between the fingers and the knob, prevent slipping during operation, avoid scratching the fingers, and improve the adjustment feel.

[0026] Working principle: When adjusting the earbud part 12 to fit the ear canal, the finger acts on the anti-slip groove 15 on the outer periphery of the head—the U-shaped groove fits the arc of the fingertip, and the evenly spaced design increases friction, allowing for stable force application even with sweaty hands. The rounded corners of the groove prevent scratching the skin during rotation. During rotation, the fine thread 5 on the rod of the screw-type adjustment knob 4 precisely engages with the internal thread of the mounting hole on the right side wall of the earphone shell 3. Because the pitch of the fine thread 5 allows for slight advance and retreat, it ensures adjustment accuracy. At the same time, the coarse thread 6 on the rod away from the head engages with the internal thread on the inner wall of the right port of the telescopic adjustment sleeve 7, causing the telescopic adjustment sleeve 7 to slide quickly along the sliding hole on the left side wall of the earphone shell 3, adjusting the length, thus forming a fine-tooth fine adjustment. The coarse-tooth quick-adjustment mode adapts to subtle differences in ear canal depth and allows for rapid adjustments, significantly improving adjustment efficiency. When the telescopic adjustment sleeve 7 slides, the square limiting rings 8 at both ends of its outer wall tightly engage with the square inner wall of the sliding hole in the earphone shell 3. This physical limitation prevents excessive extension or retraction of the sleeve, which could cause internal components to disengage. Simultaneously, the silicone buffer pad on the surface of the limiting ring 8 makes slight contact with the shell, reducing impact and friction noise while preventing scratches from hard contact, ensuring a smooth and seamless adjustment process. The sound-generating component 10 inside the telescopic adjustment sleeve 7 moves synchronously with the sleeve, and its wiring terminal is connected to the earphone cable 14 inside the earphone stem 1 via a signal wire 11. Since the earphone stem 1 and the earphone shell 3 form a connected cavity, the cable can move with the sleeve... The telescopic sleeve 7 moves freely, ensuring stable transmission of audio signals from the headphone cable 14 to the sound-generating component 10, avoiding signal interruption or noise. The dustproof mesh 9 on the left side of the telescopic adjusting sleeve 7 completely covers the sound output end of the sound-generating component 10, effectively preventing earwax and dust from entering the sound-generating component 10. Due to its reasonable mesh density design, it has a low attenuation rate for mid-to-high frequency sounds, maintaining clear and transparent sound quality. Furthermore, the dustproof mesh 9 can be disassembled and cleaned by hand through the snap-fit ​​structure between the elastic protrusions on the edge and the grooves on the inner wall of the sleeve, maintaining a pure sound field even after long-term use. The earplug part 12, which moves with the telescopic adjusting sleeve 7, has two sets of earplug fixing rings 13 on its inner side wall that form an elastic clamping fit with two annular grooves on the outer wall of the left end of the sleeve. The dual design of the two sets of fixing rings can reduce... The earbuds have a low detachment rate and can be worn stably even during vigorous exercise. The spherical elastic structure fits the ear canal contour better than traditional cylindrical earbuds, enhancing sound insulation and reducing external interference. Users can easily pull the earbud retaining ring 13 out of the annular groove with a little force. The polished inner wall of the groove reduces wear on the silicone and makes it easy to replace earbuds 12 of different sizes to fit the ear canal. In addition, the marking block 2 on the outer wall of the earphone stem 1 not only visually distinguishes between the left and right ears, but the raised character design also helps users with poor eyesight or in dark environments to quickly identify the earbuds by touch, avoiding sound field imbalance caused by wearing the wrong earbuds and ensuring symmetrical sound effects in both ears. The left and right earphone units are connected by the earphone cable 14 to form a dual-ear structure. The various types of plugs at the junction include, but are not limited to, 3.Featuring a 5mm standard audio plug, a Type-C audio plug, and a Lightning audio plug, all these connectors utilize gold-plated contacts to reduce signal transmission loss. The soft rubber sheath at the plug base minimizes wire breakage caused by frequent bending. It can directly adapt to different interface devices such as mobile phones and computers without the need for additional adapters, ensuring signal stability over long-term use. Through precise structural coordination and linkage, the various components achieve a comprehensive effect of precise and efficient adjustment, stable and comfortable wearing, clear and pure sound quality, and wide compatibility, perfectly solving the problems of poor compatibility, inconvenient adjustment, and limited compatibility of traditional in-ear headphones.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An in-ear headphone with a rotating adjustment head, characterized in that, include: The headphone stem (1), headphone housing (3), screw-type adjustment knob (4), telescopic adjustment sleeve (7), sound-generating component (10) and earplug part (12) are integrally connected to one end of the bottom of the headphone housing (3). The headphone stem (1) is hollow inside with a hole at the bottom and a headphone wire (14) is slidably connected inside the hole. The headphone housing (3) is hollow inside and forms a communicating cavity with the headphone stem (1). The left side wall of the headphone housing (3) is provided with a sliding hole and the right side wall is provided with an assembly hole. The headphone housing (3) is threadedly connected to the screw-type adjustment knob (4) through the assembly hole. The head of the screw-type adjustment knob (4) is uniformly provided with anti-slip grooves (15) on the outer periphery, and its rod is provided with fine thread (5) and coarse thread (6) distributed along the axial direction on the outer periphery. A telescopic adjustment sleeve (7) is provided at one end of the rod of the screw-type adjustment knob (4). The telescopic adjustment sleeve (7) is sleeved on the outer wall of the screw-type adjustment knob (4) and threaded. The telescopic adjustment sleeve (7) is slidably connected to the sliding hole on the left side wall of the earphone housing (3). The telescopic adjustment sleeve (7) is hollow inside. The sound-generating component (10) is fixedly installed on the left inner wall of the telescopic adjustment sleeve (7). The wiring terminal of the sound-generating component (10) is connected to the earphone wire (14) through the signal wire (11). An earplug portion (12) is provided at the left end of the telescopic adjustment sleeve (7). The inner wall of the earplug portion (12) is provided with an earplug fixing ring (13). The earplug portion (12) is fixedly sleeved on the outer wall of the telescopic adjustment sleeve (7) by the earplug fixing ring (13).

2. The in-ear headphone with a rotating adjustment head according to claim 1, characterized in that, The outer wall of the earphone stem (1) is provided with an identification block (2). The identification block (2) is fixed by an embedding method, and its surface is pressed with "L" and "R" characters to distinguish the left and right ears of the earphone.

3. An in-ear headphone with a rotating adjustment head according to claim 2, characterized in that, The earphones include a first earphone unit and a second earphone unit with mirror-symmetrical structure, which are connected by an earphone cable (14) to form a binaural wearing structure; the outer wall of the earphone stem (1) of the first earphone unit is provided with an "L" mark (2), and the outer wall of the earphone stem (1) of the second earphone unit is provided with an "R" mark (2); the junction of the earphone cables (14) of the first earphone unit and the second earphone unit is fixedly connected with multiple plug terminals, including but not limited to a 3.5mm standard audio plug, a Type-C audio plug and a Lightning audio plug.

4. An in-ear headphone with a rotating adjustment head according to claim 1, characterized in that, Limiting rings (8) are provided at both ends of the outer wall of the telescopic adjustment sleeve (7). The limiting rings (8) are square rings and are fixedly sleeved with the telescopic adjustment sleeve (7) to limit the sliding of the telescopic adjustment sleeve (7) in the sliding hole on the left side wall of the earphone housing (3). A buffer pad is fixedly installed on the surface of the limiting rings (8).

5. An in-ear headphone with a rotating adjustment head according to claim 1, characterized in that, The telescopic adjusting sleeve (7) has a dustproof net (9) on its left side port. The dustproof net (9) has multiple sets of fully penetrating circular holes inside. The dustproof net (9) is fixed to the inner wall of the left side port of the telescopic adjusting sleeve (7) by snap-fit ​​and completely covers the sound output end of the sound-generating component (10).

6. An in-ear headphone with a rotating adjustment head according to claim 1, characterized in that, The fine thread (5) and coarse thread (6) are distributed sequentially along the axial direction of the rod of the screw-type adjustment knob (4). The fine thread (5) is fixed on the side closer to the head, and the coarse thread (6) is fixed on the side farther from the head. The inner wall of the telescopic adjustment sleeve (7) near the right port is fixed with an internal thread that matches the thread of the coarse thread (6). The inner wall of the mounting hole on the right side wall of the earphone housing (3) is fixed with an internal thread that matches the thread of the fine thread (5), which is used for fine thread (5) to drive coarse thread (6) to adjust quickly.

7. An in-ear headphone with a rotating adjustment head according to claim 1, characterized in that, The earplug part (12) has a hollow spherical elastic structure. Two sets of earplug fixing rings (13) are distributed at intervals on its inner sidewall. The earplug fixing rings (13) are ring-shaped protrusions. The outer wall of the left end of the telescopic adjustment sleeve (7) is provided with two ring-shaped grooves at the corresponding positions. The earplug fixing rings (13) are elastically clamped to the ring grooves for detachable connection between the earplug part (12) and the telescopic adjustment sleeve (7).

8. An in-ear headphone with a rotating adjustment head according to claim 1, characterized in that, The anti-slip groove (15) is distributed circumferentially along the head of the screw-type adjustment knob (4), and its groove opening is U-shaped. The groove edge of the anti-slip groove (15) is rounded, and the distance between two adjacent grooves is equal.

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