High-leakage cavity structure suitable for in-ear earphone and in-ear earphone

Abstract

The utility model relates to the technical field of in-ear earphones, in particular to a high-leakage cavity structure suitable for an in-ear earphone and the in-ear earphone, which comprises a sound channel tube arranged at the front end of a front cavity and communicated with the front cavity; a plurality of first pressure relief through holes are formed in the front end face of the front cavity, and damping pieces are arranged at the rear ends of the first pressure relief through holes. The front end of the front cavity is covered with a cover plate, a second pressure relief through hole is formed in the side wall of the cover plate, and the first pressure relief through holes communicate with the second pressure relief through hole. According to the utility model, through the design of the plurality of first pressure relief through holes, the sound transmission rate can be conveniently adjusted according to actual acoustics requirements, and filtering in a broadband range can be adjusted; besides, the side wall of the cover plate is provided with the hole, so that the air can smoothly pass through the second pressure relief through hole to be discharged, the auricular conchae cavity of the user is prevented from blocking the pressure relief through hole when the earphone is worn, and the overall acoustic performance of the earphone is optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of in-ear headphones, and more specifically, to a high-leakage cavity structure applicable to in-ear headphones and an in-ear headphone. Background Art

[0002] In-ear headphones are extremely popular in modern portable audio devices due to their light weight and portability. The design of modern in-ear headphones is complex and involves multiple core components, including a sound generating unit, a headphone cavity, and other auxiliary elements; among these components, the design of the headphone cavity, especially the front cavity of the headphone, is crucial for the sound quality, which has a direct impact on the sound wave propagation path and the final sound output frequency response characteristics.

[0003] Although the design of in-ear headphones has improved in the past few years, the prior art still faces several problems.

[0004] Firstly, the reflection of sound waves in the front cavity and the formation of standing waves. These acoustic phenomena will interfere with the original sound signal, resulting in unnecessary resonance and sound attenuation, especially in the high-frequency region; this not only damages the clarity of the sound quality but also affects the natural propagation of sound, thus reducing the authenticity of the listening experience.

[0005] Secondly, the current front cavity design of headphones on the market often fails to fully consider the matching problem between the front cavity leakage and acoustic damping. This oversight will cause the headphones to generate excessive sound gain in a specific frequency range, forming so-called frequency response peaks; these peaks usually manifest as abnormal loudness at certain frequencies, which not only distorts the original frequency response of the music, making it difficult for the headphones themselves to provide a balanced listening experience, but also causes auditory discomfort.

[0006] For example, the Chinese invention patent with the publication number CN111447526A provides an acoustic coupling structure for an in-ear headphone cavity. By digging a low-quality factor ring groove on the inner wall of the sound guide tube, the high-Q value resonance peak is canceled by anti-phase coupling; and a pressure relief through hole is provided on the side wall of the headphone housing for high-pass filtering by pressure relief, and the filtering cut-off frequency can be changed by adjusting the cross-sectional area of the through hole; a damping member is attached thereto to reduce the Q value and control the bass SPL. This structure not only performs high-pass filtering but also reduces the reflection of high frequencies on the inner wall to eliminate standing waves, further reducing the high-frequency resonance peak under the pressure field. However, this structure design sets the pressure relief through hole at the position corresponding to the concha cavity; the concha cavity is the external concave part of the ear. When the in-ear headphone is worn, the pressure relief through hole may be directly opposite to the concha cavity and is easily covered by the soft tissue or skin of the ear. Especially during exercise or chewing, the movement of the ear may cause intermittent blockage of the pressure relief through hole, thus affecting the overall acoustic performance of the headphone.

[0007] Based on this, it is necessary to improve the structure of the front cavity of the in-ear headphones to prevent the user's concha from blocking the pressure relief through holes when wearing the headphones, maintain air permeability, and thus optimize the overall acoustic performance of the headphones. Summary of the Invention

[0008] The purpose of the present invention is to provide a high-leakage cavity structure and in-ear headphones applicable to in-ear headphones, which can prevent the user's concha from blocking the pressure relief through holes when wearing the headphones, maintain air permeability, and thus optimize the overall acoustic performance of the headphones.

[0009] The embodiment of the present invention is realized through the following technical solutions: A high-leakage cavity structure applicable to in-ear headphones, including a sound channel tube arranged at the front end of the front cavity and communicating with the front cavity;

[0010] A plurality of first pressure relief through holes are opened on the front end face of the front cavity, and damping members are provided at the front end or the rear end of the plurality of first pressure relief through holes;

[0011] The front end of the front cavity is covered with a cover plate, and second pressure relief through holes are opened on the side wall of the cover plate, and the plurality of first pressure relief through holes are communicated with the second pressure relief through holes.

[0012] According to a preferred embodiment, the total opening area of the plurality of first pressure relief through holes is greater than 5% of the front end face of the front cavity.

[0013] According to a preferred embodiment, N second pressure relief through holes are provided, and N is a positive integer greater than or equal to 1.

[0014] According to a preferred embodiment, the damping member is made of damping mesh cloth.

[0015] According to a preferred embodiment, an annular groove is provided at the entrance of the sound channel tube.

[0016] According to a preferred embodiment, the annular groove is cylindrical, and one side of the annular groove is communicated with the sound channel tube.

[0017] According to a preferred embodiment, the axis of the annular groove intersects with the axis of the sound channel tube.

[0018] According to a preferred embodiment, multiple layers of annular grooves are provided, and the multiple layers of annular grooves are arranged in a stepped manner.

[0019] The present invention also provides an in-ear headphone, including the high-leakage cavity structure as described above.

[0020] The technical solutions of a high-leakage cavity structure applicable to in-ear headphones and in-ear headphones provided by the embodiments of the present utility model at least have the following advantages and beneficial effects: (1) The design of several first pressure relief through holes can facilitate adjusting the sound transmission rate according to actual acoustic requirements and adjusting the filtering of the broadband range; (2) The design of the damping member can reduce the reflection of sound waves by absorbing sound energy and converting it into heat energy, and can also control the absorption and control capabilities of sound waves of different frequencies by adjusting the damping value; (3) The introduced annular groove structure not only weakens the diffraction of sound, improves the clarity and restoration degree of sound, but also facilitates processing with standard cutting tools, thereby reducing production costs and improving production efficiency at the same time; (4) By opening holes on the side wall of the cover plate, it can ensure that air can smoothly pass through the second pressure relief through holes and be discharged, prevent the user's concha cavity from blocking the pressure relief through holes when wearing the headphones, and maintain air permeability while optimizing the overall acoustic performance of the headphones. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of the high-leakage cavity structure provided by Embodiment 1 of the present utility model;

[0022] Figure 2 It is a schematic diagram of the front end face of the front cavity of the high-leakage cavity structure provided by Embodiment 1 of the present utility model;

[0023] Figure 3 It is a side view of the high-leakage cavity structure provided by Embodiment 1 of the present utility model;

[0024] Figure 4 It is a cross-sectional view of the high-leakage cavity structure provided by Embodiment 5 of the present utility model;

[0025] Figure 5 It is a schematic diagram of the rear end of the front cavity of the high-leakage cavity structure provided by Embodiment 1 of the present utility model;

[0026] Figure 6 It is an exploded view of the in-ear headphones provided by Embodiment 6 of the present utility model;

[0027] Figure 7 It is a cross-sectional view of the in-ear headphones provided by Embodiment 6 of the present utility model;

[0028] Figure 8 It is a simplified schematic diagram of the in-ear headphones provided by Embodiment 6 of the present utility model;

[0029] Figure 9 It is a schematic diagram of the front end of the cover plate of the high-leakage cavity structure provided by Embodiment 3 of the present utility model;

[0030] Figure 10 It is a schematic diagram of the rear end of the cover plate of the high-leakage cavity structure provided by Embodiment 3 of the present utility model;

[0031] Icon: 1 - Front cavity, 2 - Sound channel tube, 3 - Ring groove, 4 - First pressure relief through - hole, 5 - Cover plate, 6 - Second pressure relief through - hole, 7 - Damping member, 8 - Moving - coil loudspeaker. Detailed implementation mode

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0033] Embodiment 1

[0034] A high - leakage cavity structure suitable for in - ear headphones, as Figure 1 shown, includes a front cavity 1, a sound channel tube 2, a first pressure relief through - hole 4, a damping member 7, a cover plate 5, and a second pressure relief through - hole 6.

[0035] Among them, the sound channel tube 2 is arranged at the front end of the front cavity 1 and is communicated with the front cavity 1. The ring groove 3 is arranged at the entrance of the sound channel tube 2; by setting the ring groove 3, the diffraction phenomenon of sound waves on the surface of the component can be weakened, thereby reducing the phase cancellation and high - frequency response change caused by diffraction. This helps to improve the clarity and restoration degree of sound and enhance the user's auditory experience.

[0036] See Figure 2 and Figure 5 shown, the first pressure relief through - hole 4 is opened on the front end face of the front cavity 1, and several are opened; in this embodiment, a group of efficient acoustic perforated plates are formed by the several first pressure relief through - holes 4, and high - pass filtering is carried out in a pressure - relief manner, playing a role in filtering high - frequency signals; in addition, the design of the several first pressure relief through - holes 4 can conveniently adjust the sound transmission rate according to actual acoustic requirements and adjust the filtering of the wide - frequency band range.

[0037] The damping member 7 is arranged at the front end or the rear end of the several first pressure relief through - holes 4 to adjust the damping value of the acoustic perforated plate to affect its filtering effect, and can also convert a part of the passed sound waves into heat energy to reduce the reflection of sound waves. In this embodiment, by arranging the damping member 7 at the front end or the rear end of the first pressure relief through - hole 4, not only the acoustic performance is optimized, but also under the interaction of the leakage amount of the front cavity 1 optimized by the acoustic perforated plate and the acoustic damping of the damping member 7, the formation of high - frequency resonance peaks is effectively controlled.

[0038] Furthermore, see Figure 1 and Figure 3As shown, the cover plate 5 provided in this embodiment covers the front end of the front cavity 1, and the second pressure relief through hole 6 is opened on the side wall of the cover plate 5, which can effectively prevent the user's concha from blocking the pressure relief through hole when wearing the earphone; several first pressure relief through holes 4 are communicated with the second pressure relief through hole 6, so that air can be discharged smoothly through the second pressure relief through hole 6. In addition, the second pressure relief through hole 6 is coordinated with the opening area of the acoustic perforated plate. This cooperation not only ensures sufficient air permeability and can effectively prevent the auricle from blocking during wearing to prevent changes in the filter characteristics, but also the cover plate 5 ensures the optimized consistency of the acoustic performance through an independent structure and materials.

[0039] Embodiment 2

[0040] Based on the technical solution of Embodiment 1, this embodiment further illustrates the opening design of the acoustic perforated plate.

[0041] As a preferred solution, the total opening area of the several first pressure relief through holes 4 described in this embodiment is greater than 5% of the front end face of the front cavity 1.

[0042] In a preferred implementation manner, the inlet of the sound channel tube 2 is connected to the lower end of the front cavity 1, and the first pressure relief through holes 4 are relatively evenly distributed above the annular groove 3, and the formed acoustic perforated plate is crescent-shaped; the shape of the first pressure relief through holes 4 can be selected as an oblong hole or a round hole, etc. The number and shape of the first pressure relief through holes 4 are not specifically limited here.

[0043] Embodiment 3

[0044] Based on the technical solution of Embodiment 1, this embodiment further illustrates the structure of the cover plate 5.

[0045] As a preferred solution, see Figure 9 and Figure 10 As shown, there are N second pressure relief through holes 6, where N is a positive integer greater than or equal to 1. In this embodiment, N is 2, and the two second pressure relief through holes 6 are symmetrically arranged on the opposite side walls of the cover plate 5.

[0046] In a preferred implementation manner, a clamping block is provided on the front end face of the front cavity 1, and a clamping groove adapted to the outer shape of the clamping block is provided at the rear end of the cover plate 5. The cover plate 5 and the front cavity 1 are connected and fixed by a clamping method.

[0047] Embodiment 4

[0048] Based on the technical solution of Embodiment 1, this embodiment further illustrates the material selection of the damping member 7.

[0049] As a preferred solution, the damping member 7 is made of a damping mesh cloth. By selecting an appropriate mesh cloth material and adjusting its density and thickness, the absorption and control capabilities of the damping member 7 for sound waves of different frequencies can be finely adjusted, and the adjustment of the acoustic performance can be further refined.

[0050] Example 5

[0051] Based on the technical solution of Example 1, this example further illustrates the structure of the annular groove 3.

[0052] As a preferred solution, the annular groove 3 is cylindrical, and one side of the annular groove 3 communicates with the sound channel tube 2.

[0053] See Figure 4 As shown, the axis of the annular groove 3 intersects the axis of the sound channel tube 2. In addition, it can also be parallel to the axis of the sound guide tube, and no specific limitation is made here.

[0054] The annular groove 3 is provided with multiple layers, such as 3 layers, 4 layers, etc., and no specific limitation is made here; the multiple layers of the annular groove 3 are arranged in a stepped manner, thereby expanding the inlet diameter of the sound channel tube 2 so that it can be adapted to use a standard milling cutter head for processing, which is beneficial to both production efficiency and cost control.

[0055] Through the setting of the stepped annular groove 3 in this example, the diffraction phenomenon of sound waves on the surface of the component can be cleverly weakened, reducing the phase cancellation and high-frequency response changes caused by diffraction, helping to improve the clarity and restoration of sound, and also enhancing the user's auditory experience.

[0056] Example 6

[0057] Based on the technical solutions of Examples 1 to 5, this example provides an in-ear headphone. See Figures 6 to 8 As shown, the in-ear headphone includes the high-leakage cavity structure as described in Examples 1 to 5 and a moving coil speaker 8 disposed inside the high-leakage cavity structure, and the moving coil speaker 8 is arranged at the rear end of the damping member 7.

[0058] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high leakage cavity structure suitable for in-ear headphones, characterized in that: It comprises a sound channel tube (2) arranged at the front end of the front cavity (1) and connected to the front cavity (1); A plurality of first pressure relief through holes (4) are provided on the front end surface of the front cavity (1), and a damping member (7) is provided at the front end or the rear end of the plurality of first pressure relief through holes (4); The front end cover of the front cavity (1) is provided with a cover plate (5), a second pressure relief through hole (6) is opened on the side wall of the cover plate (5), and the plurality of first pressure relief through holes (4) are connected to the second pressure relief through holes (6).

2. The high leakage cavity structure suitable for in-ear headphones according to claim 1, characterized in that: The total opening area of ​​the plurality of first pressure relief through holes (4) is greater than 5% of the front end surface of the front cavity (1).

3. The high leakage cavity structure suitable for in-ear headphones according to claim 1, characterized in that: The second pressure relief through holes (6) are provided with N number, where N is a positive integer greater than or equal to 1.

4. The high leakage cavity structure suitable for in-ear headphones according to claim 1, characterized in that: The damping member (7) is made of damping mesh cloth.

5. The high leakage cavity structure suitable for in-ear headphones according to any one of claims 1 to 4, characterized in that: An annular groove (3) is provided at the entrance of the sound channel tube (2).

6. The high leakage cavity structure suitable for in-ear headphones according to claim 5, characterized in that: The annular groove (3) is columnar, and one side of the annular groove (3) is connected to the sound channel tube (2).

7. The high leakage cavity structure suitable for in-ear headphones according to claim 6, characterized in that: The annular groove (3) is provided with multiple layers, and the multiple layers of the annular groove (3) are arranged in a stepped manner.

8. An in-ear headset, characterized in that: It comprises a high leakage cavity structure as described in any one of claims 1 to 7.

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