A headphone structure with a variable front cavity

Abstract

The utility model discloses a variable earphone structure of front cavity, including flat earphone, adapter, flexible earplug cover, flat earphone has the sound outlet, the adapter detachable cover is equipped at the sound outlet periphery, and the adapter includes the sound pipe with the sound outlet, and the adapter inside has the chamber that respectively intercommunication sound outlet and sound outlet, is equipped with the pressure relief hole on the sound pipe, the flexible earplug cover is equipped on the sound pipe and is with the pressure relief hole staggered. In this variable earphone structure of front cavity, flat earphone can directly be used as half -in -ear earphone, when installing adapter on flat earphone, can be used as in -ear earphone, realized earphone structure front cavity's change, can realize earphone structure between in -ear earphone and half -in -ear earphone's instantaneous switching, let user need not purchase multiple earphone to consider in -ear earphone's noise isolation low frequency advantage and half -in -ear earphone's breathable comfortable experience, thereby significantly reduce the cost of user's repeated purchase for adapting different scene.

Description

Technical Field

[0001] This utility model relates to the field of headphone technology, and in particular to a headphone structure with a variable front cavity. Background Technology

[0002] With the explosive growth of the TWS earphone market, both in-ear and semi-in-ear earphones have flourished. In-ear earphones, thanks to their sealed front cavity formed deep inside the ear canal, have significant advantages in noise isolation, bass response, and sensitivity. However, they also suffer from drawbacks such as poor size fit, discomfort after prolonged wear, and a noticeable stethoscope effect. Semi-in-ear earphones, on the other hand, offer a comfortable experience due to their loose, breathable design, low cost, and ability to naturally monitor the environment, but they are susceptible to bass attenuation, reduced noise isolation and signal-to-noise ratio due to front cavity leakage, and are prone to falling out during vigorous exercise. As a result, consumers often need to purchase multiple pairs of earphones to achieve the best experience in different scenarios, which undoubtedly increases the cost of use. Moreover, earphones are updated rapidly, and having multiple pairs further increases the purchase cost for users. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a variable front cavity headphone structure that can reduce user costs.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a variable front cavity earphone structure, comprising: Flat-head headphones, wherein the flat-head headphones have a sound outlet; An adapter is detachably fitted around the mouthpiece. The adapter includes a sound tube with a sound outlet. The adapter has chambers inside that communicate with the mouthpiece and the sound outlet respectively. The sound tube is provided with a pressure relief hole. A flexible earplug sleeve is fitted onto the sound outlet tube and is misaligned with the pressure relief hole.

[0005] Furthermore, the adapter also includes a sleeve cap connected to the sound outlet tube, and the adapter is fitted onto the outer periphery of the sound outlet via the sleeve cap.

[0006] Furthermore, the socket cap is provided with an adapter block, the adapter block has a mounting groove, the adapter block is detachably fitted onto the outer periphery of the sound outlet through the mounting groove, the socket cap is indirectly connected to the flat-head earphone through the adapter block, and the adapter block has a through hole connecting the mounting groove and the cavity.

[0007] Furthermore, the adapter block is detachably connected to the socket cap.

[0008] Furthermore, the adapter block has multiple mounting slots arranged coaxially, and the diameter of the multiple mounting slots gradually decreases from the end away from the sound outlet to the end closer to the sound outlet.

[0009] Furthermore, the socket cap and the sound tube are integrally formed into a single structure.

[0010] Furthermore, the number of pressure relief holes is multiple, and the multiple pressure relief holes are evenly distributed along the circumference of the sound outlet pipe; or, the multiple pressure relief holes are evenly distributed along the axial direction of the sound outlet pipe.

[0011] Furthermore, the central axis of the pressure relief hole is perpendicular to the central axis of the sound outlet pipe.

[0012] Furthermore, the outer surface of the adapter is provided with anti-slip texture.

[0013] Furthermore, the flexible earplug sleeve is detachably connected to the sound tube.

[0014] The beneficial effects of this utility model are as follows: In this variable front cavity headphone structure, the earbuds can be used directly as semi-in-ear headphones. When an adapter is installed on the earbuds, they can be used as in-ear headphones. This achieves a change in the front cavity of the headphone structure, enabling instant switching between in-ear and semi-in-ear headphone structures. Users can enjoy the noise isolation and low-frequency advantages of in-ear headphones and the breathable comfort of semi-in-ear headphones without having to buy multiple pairs. This significantly reduces the cost of repeated purchases for different scenarios and minimizes resource waste from idle equipment. The presence of a pressure relief hole improves the comfort of using the variable front cavity headphone structure as an in-ear headphone, preventing discomfort caused by pressure imbalance inside and outside the ear canal. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the variable front cavity earphone structure in Embodiment 1; Figure 2 This is an exploded view of the variable front cavity headphone structure according to Embodiment 1; Figure 3 This is a schematic diagram of a portion of the variable front cavity headphone structure in Embodiment 1; Figure 4 This is a schematic diagram of the overall structure of the variable front cavity earphone structure in Embodiment 2; Figure 5 This is an exploded view of the variable front cavity headphone structure of Embodiment 2; Figure 6 This is a cross-sectional view of a portion of the variable front cavity headphone structure of Embodiment 2.

[0016] Label Explanation: 1. Flat-head headphones; 11. Sound outlet; 2. Adapter; 21. Sound tube; 211. Sound outlet; 212. Pressure relief hole; 213. Annular rib; 22. Connecting cap; 23. Chamber; 3. Flexible ear tips; 4. Adapter block; 41. Mounting slot; 42. Through hole. Detailed Implementation

[0017] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0018] Please refer to Figures 1 to 6 A variable front cavity headphone structure, comprising: Flat-head earphone 1, wherein the flat-head earphone 1 has a sound outlet 11; Adapter 2, which is detachably sleeved on the outer periphery of the sound outlet 11, includes a sound tube 21 with a sound outlet 211, and has a chamber 23 inside that communicates with the sound outlet 11 and the sound outlet 211 respectively. The sound tube 21 is provided with a pressure relief hole 212. Flexible earplug sleeve 3, which is fitted on the sound outlet tube 21 and misaligned with the pressure relief hole 212.

[0019] As can be seen from the above description, the beneficial effects of this utility model are as follows: In this variable front cavity headphone structure, the flat-head headphone 1 can be used directly as a semi-in-ear headphone. When the adapter 2 is installed on the flat-head headphone 1, it can be used as an in-ear headphone. This realizes the change of the headphone structure's front cavity, enabling instant switching between in-ear and semi-in-ear headphone structures. This allows users to enjoy both the noise isolation and low-frequency advantages of in-ear headphones and the breathable comfort of semi-in-ear headphones without having to buy multiple pairs. This significantly reduces the cost of repeated purchases for different scenarios and reduces resource waste caused by idle equipment. The presence of the pressure relief hole 212 can improve the comfort of the variable front cavity headphone structure when used as an in-ear headphone, avoiding discomfort caused by the imbalance of air pressure inside and outside the ear canal when the user wears it.

[0020] Furthermore, the adapter 2 also includes a sleeve cap 22 connected to the sound tube 21, and the adapter 2 is sleeved on the outer periphery of the sound nozzle 11 through the sleeve cap 22.

[0021] As can be seen from the above description, the socket cap 22 on the adapter 2 has a simple structure and is easy to manufacture. It also allows the adapter 2 to be quickly assembled and disassembled with the flat-head earphone 1, making it convenient for users.

[0022] Furthermore, the socket cap 22 is provided with an adapter block 4, the adapter block 4 has a mounting groove 41, the adapter block 4 is detachably sleeved on the outer periphery of the sound outlet 11 through the mounting groove 41, the socket cap 22 is indirectly connected to the flat-head earphone 1 through the adapter block 4, and the adapter block 4 has a through hole 42 connecting the mounting groove 41 and the cavity 23.

[0023] As can be seen from the above description, the adapter block 4 can be made of wear-resistant or elastic materials, which helps to extend the service life of the album or improve the sealing of the connection between the adapter 2 and the flat-head headphones 1, thereby ensuring sound quality.

[0024] Furthermore, the adapter block 4 is detachably connected to the socket cap 22.

[0025] As can be seen from the above description, when the adapter block 4 wears out due to frequent disassembly and assembly or needs to be adapted to a new standard flat-head headphone 1, the user only needs to replace the adapter block 4 without discarding the entire adapter 2, thereby reducing the later maintenance cost and improving the economic efficiency of the whole device's life cycle.

[0026] Furthermore, the adapter block 4 has a plurality of mounting slots 41 arranged coaxially, and the diameter of the plurality of mounting slots 41 gradually decreases from the end away from the sound outlet 211 to the end closer to the sound outlet 211.

[0027] As described above, a set of adapter block 4 can be compatible with a variety of sound outlets 11 with different outer diameters. Manufacturers do not need to make a dedicated adapter 2 for each flat-head headphone 1, which reduces the number of molds and inventory SKUs. When users replace flat-head headphone 1, they can use the original adapter 2, which improves the universality of accessories and the consumer experience, and helps to further reduce the user's cost.

[0028] Furthermore, the socket cap 22 and the sound tube 21 are integrally formed into a single structure.

[0029] As described above, eliminating the gaps caused by traditional two-piece gluing or ultrasonic welding significantly enhances the overall rigidity and sealing reliability of the adapter 2, reduces assembly tolerances, lowers process complexity and unit cost, and at the same time prevents dirt and grime from accumulating in the seams, thus improving hygiene.

[0030] Furthermore, there are multiple pressure relief holes 212, which are evenly distributed circumferentially along the sound outlet pipe 21; or, the multiple pressure relief holes 212 are evenly distributed axially along the sound outlet pipe 21.

[0031] As described above, the uniformly distributed hole group forms a symmetrical leakage network, which allows the air pressure in the front cavity to be released synchronously in the circumferential / axial direction, suppressing the noise peak caused by the airflow vortex of a single hole and reducing the stethoscope effect; at the same time, the uniformly distributed structure weakens the local stress concentration and improves the bending strength of the thin-walled sound tube 21.

[0032] Furthermore, the central axis of the pressure relief hole 212 is perpendicular to the central axis of the sound outlet pipe 21.

[0033] As described above, the axial direction of the pressure relief hole 212 is perpendicular to the pipe wall, and it can be completed radially in one operation, reducing the risk of burrs and blockage caused by oblique holes; the vertical channel allows the airflow to escape directly, reducing airflow resistance, maintaining the low-frequency natural attenuation curve in semi-in-ear mode, and reducing EQ compensation.

[0034] Furthermore, the outer surface of the adapter 2 is provided with anti-slip texture.

[0035] As described above, the static friction between the fingers and the anti-slip texture during disassembly and assembly allows for quick insertion or removal without the need for tools, improving ease of operation. The anti-slip texture also serves as an aesthetic feature, enhancing product recognition and brand differentiation.

[0036] Furthermore, the flexible earplug 3 is detachably connected to the sound tube 21.

[0037] As described above, the flexible ear tips 3 can be replaced individually when they are aged, damaged, or when users require different hardness / sizes, thus avoiding the entire adapter 2 from being scrapped. After disassembly, the adapter 2 can be used as a "semi-in-ear" extension tube, enabling the same hardware to switch freely between three wearing modes and expanding the adaptability of different scenarios.

[0038] Please refer to Figures 1 to 3 Embodiment 1 of this utility model is: a variable front cavity headphone structure, including a flat-head headphone 1, an adapter 2, and a flexible earbud 3. The flat-head headphone 1 has an inner cavity, in which a sound-producing unit is provided. The head of the flat-head headphone 1 has a sound outlet 11, which communicates with the inner cavity. The adapter 2 is detachably fitted around the outer periphery of the sound outlet 11. The adapter 2 includes a sound tube 21 with a sound outlet 211. The adapter 2 has a chamber 23 inside that communicates with the sound outlet 11 and the sound outlet 211 respectively. The sound tube 21 has a pressure relief hole 212. The flexible earbud 3 is fitted on the sound tube 21 and is misaligned with the pressure relief hole 212. The misalignment of the flexible earbud 3 with the pressure relief hole 212 means that the flexible earbud 3 will not block the pressure relief hole 212 after being fitted on the sound tube 21.

[0039] Specifically, the flexible earbud cover 3 is arranged around the sound outlet 211, so that the sound outlet 211 is exposed from the hollow area of ​​the flexible earbud cover 3. The flexible earbud cover 3 is a conventional structure of in-ear headphones, which will not be described in detail here.

[0040] The adapter 2 also includes a sleeve cap 22 connected to the sound outlet tube 21. The adapter 2 is fitted onto the outer periphery of the sound outlet 11 through the sleeve cap 22. The sleeve cap 22 and the sound outlet tube 21 are integrally formed. In this embodiment, the adapter 2 is a plastic part, and the peripheral wall thickness of the sleeve cap 22 is relatively thin, which allows for a certain degree of elastic deformation. Therefore, the sleeve cap 22 and the earphone 1 can achieve an interference fit, thereby enabling the adapter 2 to be firmly installed on the earphone 1.

[0041] In this embodiment, the number of pressure relief holes 212 is one. Preferably, the central axis of the pressure relief hole 212 is perpendicular to the central axis of the sound outlet pipe 21. In other embodiments, the number of pressure relief holes 212 is multiple. In this case, the multiple pressure relief holes 212 are evenly distributed circumferentially along the sound outlet pipe 21; or, the multiple pressure relief holes 212 are evenly distributed axially along the sound outlet pipe 21.

[0042] In some embodiments, the outer surface of the adapter 2 is provided with anti-slip texture (not shown in the figure).

[0043] To facilitate the replacement and cleaning of the flexible earplug sleeve 3, it is preferable that the flexible earplug sleeve 3 is detachably connected to the sound outlet tube 21. In this embodiment, the outer wall of the end of the sound outlet tube 21 away from the sleeve cap 22 is provided with an annular rib 213, and the inner wall of the flexible earplug sleeve 3 is provided with an annular groove. The rib and the groove are engaged to limit the axial displacement of the flexible earplug sleeve 3 relative to the sound outlet tube 21.

[0044] Please refer to Figures 4 to 6 The second embodiment of this utility model is a further improvement on the first embodiment: In this embodiment, the socket cap 22 is provided with an adapter block 4, the adapter block 4 has an installation groove 41, the adapter block 4 is detachably sleeved on the outer periphery of the sound outlet 11 through the installation groove 41, the socket cap 22 is indirectly connected to the flat-head earphone 1 through the adapter block 4, and the adapter block 4 has a through hole 42 that connects the installation groove 41 and the cavity 23.

[0045] In some embodiments, the adapter block 4 and the socket cap 22 are detachably connected, for example, by threaded connection, interference fit, etc.

[0046] In another embodiment, the adapter block 4 has a plurality of coaxially arranged mounting slots 41, the diameter of which gradually decreases from the end away from the sound outlet 211 to the end closer to the sound outlet 211, so that the adapter block 4 can be used with various different sizes of flat-head headphones 1.

[0047] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A variable front cavity headphone structure, characterized in that, include Flat-head headphones, wherein the flat-head headphones have a sound outlet; An adapter is detachably fitted around the mouthpiece. The adapter includes a sound tube with a sound outlet. The adapter has chambers inside that communicate with the mouthpiece and the sound outlet respectively. The sound tube is provided with a pressure relief hole. A flexible earplug sleeve is fitted onto the sound outlet tube and is misaligned with the pressure relief hole.

2. The variable front cavity headphone structure according to claim 1, characterized in that, The adapter also includes a sleeve cap connected to the sound tube, and the adapter is fitted onto the outer periphery of the sound nozzle through the sleeve cap.

3. The variable front cavity headphone structure according to claim 2, characterized in that, The socket cap is provided with an adapter block, the adapter block has a mounting groove, the adapter block is detachably fitted on the outer periphery of the sound outlet through the mounting groove, the socket cap is indirectly connected to the flat-head earphone through the adapter block, and the adapter block has a through hole connecting the mounting groove and the cavity.

4. The variable front cavity headphone structure according to claim 3, characterized in that, The adapter block is detachably connected to the socket cap.

5. The variable front cavity headphone structure according to claim 3, characterized in that, The adapter block has multiple mounting slots arranged coaxially, and the diameter of the multiple mounting slots gradually decreases from the end away from the sound outlet to the end closer to the sound outlet.

6. The variable front cavity headphone structure according to claim 2, characterized in that, The sleeve cap and the sound tube are integrally formed into a single structure.

7. The earphone structure with a variable front cavity according to claim 1, characterized in that, The number of pressure relief holes is multiple, and the multiple pressure relief holes are evenly distributed along the circumference of the sound outlet pipe; or, the multiple pressure relief holes are evenly distributed along the axial direction of the sound outlet pipe.

8. The earphone structure with a variable front cavity according to claim 1, characterized in that, The central axis of the pressure relief hole is perpendicular to the central axis of the sound outlet pipe.

9. The earphone structure with a variable front cavity according to claim 1, characterized in that, The outer surface of the adapter is provided with anti-slip texture.

10. The earphone structure with a variable front cavity according to claim 1, characterized in that, The flexible earplug is detachably connected to the sound tube.

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