Adjustable headphones

Abstract

The present application discloses a tunable earphone, comprising an earphone structure and an ear stem, wherein the earphone structure comprises a housing, a speaker, and a tuning hole, the ear stem comprises a stem body, a tuning plate, and an audio cable, the speaker being disposed within the housing, a resonance chamber being formed between the speaker and the housing, the housing having a first connection portion on the outside thereof, the tuning hole being located at the first connection portion, the tuning hole passing through the housing and communicating with the resonance chamber, the stem having a second connection portion on the outside thereof, the tuning plate being disposed at the second connection portion, the first connection portion and the second connection portion being rotatably disposed, the tuning hole of the first connection portion being located on a rotational path of the tuning plate of the second connection portion, one end of the audio cable passing through the first connection portion and the second connection portion within the stem, and one end of the audio cable being electrically connected to the speaker. The present application achieves the purpose of changing the sound frequency by rotating the ear stem to change the relative position between the tuning plate and the tuning hole, and by opening or covering the tuning hole with the tuning plate to change the air pressure within the resonance chamber.

Description

Technical Field

[0001] The present application relates to an earphone, and in particular to an adjustable earphone. Background Art

[0002] Headphones are becoming increasingly popular. The timbre and listening experience of music or sounds played through headphones are fixed, but these headphones cannot meet everyone's timbre needs. To address this issue, while it is currently possible to change the timbre of headphone playback by adjusting the audio's electronic signal, this can cause sound distortion, resulting in reduced sound quality. Summary of the Invention

[0003] The present application provides an adjustable earphone, which can solve the existing problem that the sound played by the earphone may be distorted by adjusting the electronic signal.

[0004] To achieve the above-mentioned objectives, the present application provides a tuneable earphone, comprising: an earphone structure, the earphone structure comprising a housing, a speaker, and a tuning hole, the speaker being disposed within the housing, a resonance chamber being formed between the speaker and the housing, a first connecting portion being provided on the outside of the housing, the tuning hole being located within the first connecting portion, the tuning hole being passed through the housing, and the tuning hole being connected to the resonance chamber. An ear rod, comprising a rod body, a tuning plate, and an audio cable, the rod body having a second connecting portion being provided on the outside of the rod body, the tuning plate being disposed on the second connecting portion, the first connecting portion and the second connecting portion being rotatably disposed, the tuning hole of the first connecting portion being located on the rotational path of the tuning plate of the second connecting portion, one end of the audio cable passing through the first connecting portion and the second connecting portion from within the rod body, and one end of the audio cable being electrically connected to the speaker.

[0005] In one embodiment, the first connecting portion includes an annular groove, the tuning hole is located at the bottom of the annular groove, the first connecting portion is connected to the second connecting portion, the tuning piece is located in the annular groove, and there are one or more tuning holes.

[0006] In one embodiment, the first connecting part includes a through hole, which passes through the shell and connects to the resonance cavity, and the through hole is located in the annular groove. The second connecting part includes a snap assembly, which is located on the peripheral side of the audio cable, one end of the snap assembly passes through the through hole, and one end of the snap assembly is engaged with the side wall of the hole of the through hole located on the inner side of the shell.

[0007] In one embodiment, the ear stem further includes a stop ring, which is sleeved on the buckle assembly. The peripheral side of the through hole further includes a limiting notch, and the stop ring is embedded in the limiting notch.

[0008] In one embodiment, the first connecting portion further includes a limiting assembly, the limiting assembly includes a first limiting member and a second limiting member, the first limiting member and the second limiting member are arranged in the annular groove, and the snap assembly further includes a first stop member and a second stop member, the first stop member and the second stop member are located at both ends of the tuning piece, wherein the first stop member is adjacent to the side with the first limiting member, and the second stop member is adjacent to the side with the second limiting member.

[0009] In one embodiment, the snap assembly has a column and a snap protrusion, the snap protrusion extends outward from the peripheral side of one end of the column, the column is penetrated by a through hole, and the snap protrusion is engaged with the side wall of the through hole located on the inner side of the shell.

[0010] In one embodiment, the first stop member abuts against the first limiting member, and the tuning plate completely covers the tuning hole, wherein the second connection rotates relative to the first connection portion, and the second connection portion drives the first stop member and the second stop member to rotate, and the second stop member moves toward the second limiting member, and the tuning plate gradually opens the tuning hole, and the second stop member abuts against the second limiting member, and the tuning plate completely opens the tuning hole.

[0011] In one embodiment, the tuning piece is of arc-shaped structure, the rotation path of the tuning piece is between the first limiting member and the second limiting member in the annular groove, and the length of the arc edge of the tuning piece is smaller than the path length of the rotation path of the tuning piece.

[0012] In one embodiment, the buckle assembly further includes a third stop member, which is located between the first limit member and the second limit member in an annular groove without the first stop member and the second stop member, wherein when the first stop member abuts against the first limit member, the third stop member abuts against the second limit member; or when the second stop member abuts against the second limit member, the third stop member abuts against the first limit member.

[0013] In one embodiment, a dustproof net is provided on the inner side of the housing, and the dustproof net covers the tuning hole.

[0014] In one embodiment, the outer side of the shell further has a first positioning mark, which is located on one side of the first connecting part, and the outer side of the rod body has a second positioning mark, which is located on one side of the second connecting part. When the second connecting part rotates relative to the first connecting part, the second positioning mark corresponds to the first positioning mark.

[0015] The present application provides a tunable earphone, which changes the relative position of the second connecting part relative to the first connecting part by rotating the ear stem, adjusts the relative position between the tuning plate and the tuning hole, and opens or covers the tuning hole by the tuning plate to change the air pressure in the resonance cavity, thereby achieving the purpose of changing the sound frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The exemplary embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 is a schematic diagram of the adjustable earphones of the present application;

[0018] Figure 2 is a three-dimensional exploded view of the adjustable earphones of the present application;

[0019] Figure 3 yes Figure 1 Sectional view of line segment A-A';

[0020] Figure 4 is another schematic diagram of the adjustable earphones of the present application;

[0021] Figure 5 yes Figure 4 Sectional view of the C-C' line segment;

[0022] Figure 6 yes Figure 5 Another action diagram of ;

[0023] Figure 7 yes Figure 5 Another action diagram of ;

[0024] Figure 8 yes Figure 4 Another cross-sectional view of the line segment C-C'; and

[0025] Figure 9 yes Figure 2 Cross-sectional view of the BB' line segment. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] In this embodiment, if Figure 1 、 Figure 2 and Figure 3 shown, and Figure 3 yes Figure 1In the cross-sectional view along the A-A' line, the tunable earphone 10 includes an earphone structure 20 and an ear stem 30. The earphone structure 20 includes a housing 21, a speaker 22, and a tuning hole 23. The ear stem 30 includes a rod body 31, a tuning plate 32, and an audio cable 33. The speaker 22 is disposed within the housing 21, forming a resonance chamber 24 between the speaker 22 and the housing 21. The housing 21 has a first connecting portion 211 on its exterior. The tuning hole 23 is located within the first connecting portion 211. The tuning hole 23 passes through the housing 21 and connects to the resonance chamber 24. The resonance chamber 24 communicates with the outside world through the tuning hole 23. The rod body 31 has a second connecting portion 311 on its exterior. The tuning plate 32 is disposed on the second connecting portion 311. The first connecting portion 211 and the second connecting portion 311 are rotatably arranged. The tuning hole 23 of the first connecting portion 211 is located on the rotation path of the tuning plate 32 of the second connecting portion 311. One end of the audio cable 33 passes through the first connecting portion 211 and the second connecting portion 311 in the rod body 31 , and one end of the audio cable 33 is electrically connected to the speaker 22 .

[0028] As described above, the first connecting portion 211 includes an annular groove 2111 and a through hole 2112. The tuning hole 23 is located at the bottom of the annular groove 2111. The through hole 2112 penetrates the housing 21 and connects to the resonance cavity 24. The through hole 2112 is located inside the annular groove 2111, that is, the annular groove 2111 is arranged around the through hole 2112. There are one or more tuning holes 23. When there are multiple tuning holes 23, the tuning holes 23 correspond to the bottom of the annular groove 2111 and are arranged in an arc shape. The audio cable 33 passes through the through hole 2112, passes through the resonance cavity 24, and connects to the speaker 22.

[0029] In addition, the earphone structure 20 also includes a front sound cavity 25, which is a sound-emitting port connected to the shell 21. The front sound cavity 25 is connected to the resonance cavity 24. The speaker 22 is located between the resonance cavity 24 and the front sound cavity 25. The resonance cavity 24 is located on one side of the shell 21. The speaker 22 emits sound through vibration, and the sound resonates with the resonance cavity 24 to produce sound. The sound after the resonance effect is then emitted through the front sound cavity 25. The user transmits the sound into the ear through the front sound cavity 25. The first connecting portion 211 includes a limiting component 2113, and the limiting component 2113 further includes a first limiting member 2114 and a second limiting member 2115. The first limiting member 2114 and the second limiting member 2115 are arranged in the annular groove 2111. One end of the first and second limiting members 2114 and 2115 extend from the wall of the annular groove 2111 toward the through hole 2112, and the other ends of the first and second limiting members 2114 and 2115 are connected to the wall of the annular groove 2111. The second connecting portion 311 includes a snap assembly 3111 positioned around the audio cable 33. The snap assembly 3111 further includes a first stop member 3112 and a second stop member 3113 positioned at opposite ends of the tuning plate 32. The first stop member 3112 is adjacent to the side with the first limiting member 2114, and the second stop member 3113 is adjacent to the side with the second limiting member 2115.

[0030] In this embodiment, the buckle assembly 3111 further includes a third stopper 3114, which is located between the first stopper 2114 and the second stopper 2115 in the annular groove 2111 that does not include the first stopper 3112 and the second stopper 3113. When the first stopper 3112 abuts against the first stopper 2114, the third stopper 3114 abuts against the second stopper 2115; or when the second stopper 3113 abuts against the second stopper 2115, the third stopper 3114 abuts against the first stopper 2114. The first stopper 3112, the second stopper 3113, and the third stopper 3114 protrude vertically outward from the side of the column 3111A.

[0031] The first connecting portion 211 and the second connecting portion 311 are rotatably arranged. The tuning hole 23 of the first connecting portion 211 is located within the annular groove 2111. The tuning piece 32 is attached to the bottom of the annular groove 2111 and moves along the bottom of the annular groove 2111. The tuning hole 23 is located along the rotation path of the tuning piece 32 of the second connecting portion 311. In other words, the annular groove 2111 serves as the rotation path of the tuning piece 32. The tuning piece 32 moves toward the surface having the tuning hole 23 to cover the tuning hole 23, or moves away from the surface having the tuning hole 23 to open the tuning hole 23.

[0032] like Figure 4and Figure 5 shown, and Figure 5 yes Figure 4 In the cross-sectional view taken along line C-C', the user rotates the ear stem 30, causing the second connecting portion 311 to rotate. The tuning plate 32 moves along the rotational path, gradually opening the tuning holes 23. By adjusting the number of openings, the air in the resonance cavity 24 and the outside air convection are generated, thereby changing the air pressure within the resonance cavity 24. When the first stop 3112 abuts the first limiter 2114, the tuning plate 32 completely covers the tuning holes 23. When the speaker 22 is not operating, the air pressure within the resonance cavity 24 remains unchanged. When the diaphragm of the speaker 22 vibrates within the housing 21, it continuously compresses and expands the air in the resonance cavity 24. When the diaphragm of the speaker 22 vibrates toward the resonance cavity 24, the vibration amplitude and vibration frequency of the diaphragm of the speaker 22 will be affected by the air pressure squeezing in the resonance cavity 24. At this time, the air pressure in the resonance cavity 24 is the first air pressure; since the resonance cavity 24 is in a relatively sealed state, it will produce a first change in the vibration mode or vibration amplitude of the diaphragm of the speaker 22, bringing about a first tuning effect.

[0033] like Figure 6 shown, and Figure 6 yes Figure 5 In another schematic diagram of the operation, the second connecting portion 311 drives the first stopper 3112 and the second stopper 3113 to rotate, and the second stopper 3113 moves toward the second limiting member 2115, causing the tuning plate 32 to gradually open the tuning hole 23. When the speaker 22 is not operating, the air pressure within the resonance chamber 24 remains unchanged. When the diaphragm of the speaker 22 vibrates within the housing 21, it continues to compress and expand the air within the resonance chamber 24. However, because some of the tuning holes 23 are uncovered by the tuning plate 32, the air within the resonance chamber 24 can circulate with the outside air through the uncovered tuning holes 23. As the diaphragm of the speaker 22 vibrates toward the resonance chamber 24, the vibration amplitude and frequency of the diaphragm are affected by the compression of the air pressure. As the air pressure within the resonance chamber 24 decreases compared to a relatively sealed resonance chamber 24, the air pressure at this time is the second air pressure. Since the resonance cavity 24 is in a relatively moderately open state, it will produce a second change in the vibration mode or vibration amplitude of the speaker 22, bringing about a second tuning effect.

[0034] like Figure 7 shown, and Figure 7 yes Figure 5In another operating diagram, when the second stop member 3113 abuts the second limiting member 2115, the tuning plate 32 fully opens the tuning hole 23, further increasing the convection between the air in the resonance chamber 24 and the outside air. Therefore, when the diaphragm of the speaker 22 vibrates toward the resonance chamber 24, the vibration amplitude and frequency of the diaphragm of the speaker 22 are affected by the compression of the air pressure, and the air pressure in the resonance chamber 24 decreases again. The air pressure at this point is a third air pressure, where the first air pressure is greater than the second air pressure, and the second air pressure is greater than the third air pressure. Because the resonance chamber 24 is relatively open, it produces a third change in the vibration mode or amplitude of the speaker 22, resulting in a third tuning effect.

[0035] above Figure 5 、 Figure 6 and Figure 7 The related description mainly illustrates three states, but is not limited to these. In some embodiments, depending on how many tuning holes 23 are not covered by the tuning plate 32 or are all covered by the tuning plate 32, that is, when the speaker 22 vibrates in the shell 21, the air in the resonance cavity 24 can convect with the outside air through how many tuning holes 23, which will affect the change in the air pressure of the resonance cavity 24 or the change in the amount of air exchange with the outside, which will produce corresponding changes in the vibration mode or vibration amplitude of the speaker 22, thereby adjusting the resonant frequency and bringing about a corresponding tuning effect. In some embodiments, depending on how many tuning holes 23 are not covered by the tuning plate 32 or are all covered by the tuning plate 32, the frequency response of the mid- and low-frequency of the speaker 22 can be mainly changed.

[0036] In addition, in addition to adjusting the air pressure of the resonance chamber 24 through the tuning hole 23, thereby changing the vibration amplitude and vibration frequency of the diaphragm of the speaker 22, the sound change of the above-mentioned speaker 22 further includes a front sound chamber 25, which can also adjust the vibration amplitude and vibration frequency of the diaphragm of the speaker 22, thereby adjusting the mid- and low-frequency timbre of the speaker 22.

[0037] In this embodiment, refer to Figure 2 As shown, the ear stem 30 further includes a stop ring 34 made of soft rubber. The through hole 2112 further includes a limiting notch 2116, which the stop ring 34 engages with. The stop ring 34 is fitted with a snap assembly 3111. The tuning piece 32 is located on one side of the stop ring 34, which is located inside the annular groove 2111. The second connecting portion 311 drives the stop ring 34 to rotate. The stop ring 34 has multiple notches corresponding to the first stop member 3112, the second stop member 3113, and the third stop member 3114, allowing the stop ring 34 to engage with the first stop member 3112, the second stop member 3113, and the third stop member 3114.

[0038] When the user rotates the ear stem 30 to adjust the position of the tuning plate 32, the force applied to the second connection portion 311 by the user must be greater than the friction between the stop ring 34 and the limiting notch 2116. When the second connection portion 311 stops rotating and the user no longer applies force to the second connection portion 311, the friction between the stop ring 34 and the limiting notch 2116 prevents the second connection portion 311 from rotating freely. In other words, the position of the ear stem 30 relative to the earphone structure 20 is fixed, and the tuning plate 32 is fixed in place covering the tuning hole 23.

[0039] In this embodiment, the snap assembly 3111 protrudes from the outside of the rod 31. The snap assembly 3111 includes a column 3111A and multiple snap protrusions 3111B. The multiple snap protrusions 3111B extend outward from one end of the column 3111A. The multiple snap protrusions 3111B protrude from the outside of the column 3111A in a direction parallel to the rod 31. The other end of the column 3111A is perpendicularly disposed on the outside of the rod 31. One side of the multiple snap protrusions 3111B is located between the tuning plate 32 and the audio cable 33. One end of the snap assembly 3111 is inserted into the through hole 2112. The column 3111A passes through the through hole 2112, and the multiple snap protrusions 3111B are fixed to the side wall of the through hole 2112.

[0040] Furthermore, when the snap assembly 3111 passes through the through hole 2112, the multiple snap protrusions 3111B of the snap assembly 3111 are affected by external force and gradually shrink and become smaller than the hole size of the through hole 2112. The multiple snap protrusions 3111B pass through the through hole 2112 in a compressed state. After the multiple snap protrusions 3111B of the snap assembly 3111 enter the inner side of the shell 21, the multiple snap protrusions 3111B of the snap assembly 3111 are no longer affected by external force, and the multiple snap protrusions 3111B gradually expand and engage with the side wall of the hole 2112.

[0041] In this embodiment, the first connecting portion 211 is concavely arranged from the outside of the earphone structure 20, and the second connecting portion 311 is convexly arranged from the outside of the ear rod 30, wherein the speaker 22 is located on one side of the shell 21, the tuning hole 23 is located on the other side of the shell 21, and the resonance cavity 24 is located between the speaker 22 and the tuning hole 23. The tuning plate 32 is an arc-shaped structure, the tuning plate 32 protrudes from the outside of the rod body 31, the tuning plate 32 is located on one side of the audio line 33, the rotation path of the tuning plate 32 is located between the first limiter 2114 and the second limiter 2115 in the annular groove 2111, and the arc edge length of the tuning plate 32 is less than the path length of the rotation path of the tuning plate 32. In addition, the outer surface of the rod body 31 is further provided with a protective layer 35, and the protective layer 35 is coated on the outer surface of the rod body 31 by injection molding (such as Figure 3As shown), the buckle assembly 3111 passes through the protective layer 35, which can protect the outer surface of the rod body 31. At the same time, the tuning piece 32 located on the surface of the rod body 31 can also be manufactured by injection molding, that is, the protective layer 35 and the tuning piece 32 are formed as one piece.

[0042] Please refer back to Figure 1 As shown, the outer side of the shell 21 has a first positioning mark 212, and the outer side of the rod body 31 has a second positioning mark 312. The second positioning mark 312 is located on one side of the second connecting part 311. The second positioning mark 312 rotates relative to the second connecting part 311. The first positioning mark 212 is located on one side of the first connecting part 211, and there are multiple first positioning marks 212, and each first positioning mark 212 corresponds to a different number of tuning holes 23.

[0043] When the ear stem 30 is rotated, the second positioning mark 312 cooperates with the tuning piece 32 of the second connecting portion 311 to cover the tuning holes 23 . The second positioning mark 312 corresponds to different first positioning marks 212 , so that the tuning piece 32 covers different numbers of tuning holes 23 .

[0044] like Figure 8 shown, and Figure 8 yes Figure 4 Another cross-sectional view of the C-C' line segment in the middle shows that in another embodiment, the tuning hole 23 can be configured as an elongated arc-shaped hole, and the arc-shaped hole passes through the bottom of the annular groove 2111. The tuning plate 32 can completely cover the tuning hole 23. The tuning plate 32 can also be moved to different positions to open the opening of the tuning hole 23 and change the size of the opening not covered by the tuning plate 32. By adjusting the length of the arc edge of the tuning hole 23, convection is generated between the air in the resonance cavity 24 and the external air, thereby changing the air pressure in the resonance cavity 24. Furthermore, the second positioning mark 312 corresponds to different first positioning marks 212, so that the tuning plate 32 covers the openings of the tuning holes 23 of different sizes.

[0045] like Figure 9 shown, and Figure 9 yes Figure 2 In the cross-sectional view of the BB' line segment, the inner side of the shell 21 is provided with a dustproof net 213, which covers the tuning hole 23. The dustproof net 213 is annular in structure, and the outer dimensions of the dustproof net 213 correspond to the annular groove 2111. The dustproof net 213 prevents foreign matter from entering the inner side of the shell 21 through the tuning hole 23, so as to prevent dust and foreign matter from accumulating on the inner side of the shell 21, causing a short circuit in the audio cable 33 or reducing the vibration amplitude of the speaker 22, resulting in a change in the vibration frequency.

[0046] To summarize, the earphone structure includes a shell, a speaker and a resonance cavity; the ear stem includes a rod body, a tuning plate and an audio cable; the outer side of the shell has a first connection part, and the outer side of the rod body has a second connection part; the speaker is activated through the audio cable to generate sound in the earphone structure; the relative position of the second connection part relative to the first connection part is changed by rotating the ear stem, the relative position between the tuning plate and the tuning hole is adjusted, and the tuning hole is opened or covered by the tuning plate to change the air pressure in the resonance cavity or the amount of air exchange with the outside world, thereby achieving the purpose of changing the sound frequency.

[0047] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0048] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which fall within the scope of protection of this application.

Claims

1. A tunable earphone, characterized in that: include: An earphone structure includes a housing, a speaker, and a tuning hole, wherein the speaker is disposed within the housing, a resonance cavity is formed between the speaker and the housing, the housing has a first connecting portion on the outside, the first connecting portion includes a through hole, an annular groove, a first limiting member, and a second limiting member, the through hole passes through the housing and communicates with the resonance cavity, the annular groove surrounds the through hole, the tuning hole is located at the bottom of the annular groove, the tuning hole passes through the housing, and communicates with the resonance cavity, wherein there are one or more tuning holes, and the first limiting member and the second limiting member are disposed within the annular groove; and The ear rod includes a rod body, a tuning piece and an audio cable, the outer side of the rod body has a second connecting portion, the tuning piece is arranged on the second connecting portion, the tuning piece is located in the annular groove, the first connecting portion and the second connecting portion are rotatably arranged, the tuning hole of the first connecting portion is located on the rotation path of the tuning piece of the second connecting portion, and the tuning piece is configured to rotate to cover or not cover the tuning hole, the second connecting portion includes a snap assembly, the snap assembly further includes a first stopper and a second stopper, the first stopper and the second stopper are located at both ends of the tuning piece, wherein the first stopper is adjacent to the side with the first limiter, and the second stopper is adjacent to the side with the second limiter, the snap assembly is located on the circumference of the audio cable, one end of the snap assembly is passed through the through hole, and one end of the snap assembly is engaged with the side wall of the hole of the through hole located on the inner side of the shell, one end of the audio cable passes through the first connecting portion and the second connecting portion from the rod body, and one end of the audio cable is electrically connected to the speaker.

2. The tunable earphone according to claim 1, wherein: The ear rod further includes a stop ring, which is sleeved on the buckle assembly. The peripheral side of the through hole further includes a limiting notch, and the stop ring is embedded in the limiting notch.

3. The tunable earphone according to claim 2, wherein: The snap assembly comprises a column and a snap protrusion, wherein the snap protrusion extends outward from the peripheral side of one end of the column, the column is penetrated by the through hole, and the snap protrusion is engaged with the side wall of the through hole located on the inner side of the shell.

4. The tunable earphone according to claim 1, wherein: When the first stop member abuts against the first limiting member, the tuning piece completely covers the tuning hole. When the second connecting portion is configured to rotate relative to the first connecting portion, the second connecting portion drives the first stop member and the second stop member to rotate, and the second stop member moves toward the second limiting member, the tuning piece gradually opens the tuning hole. When the second stop member abuts against the second limiting member, the tuning piece completely opens the tuning hole.

5. The tunable earphone according to claim 4, wherein: The tuning piece is of arc-shaped structure, and the rotation path of the tuning piece is between the first limiting member and the second limiting member in the annular groove. The length of the arc side of the tuning piece is smaller than the path length of the rotation path of the tuning piece.

6. The tunable earphone according to claim 5, wherein: The buckle assembly further includes a third stop member, which is located between the first limiting member and the second limiting member in the annular groove without the first stop member and the second stop member, wherein when the first stop member abuts against the first limiting member, the third stop member abuts against the second limiting member; or when the second stop member abuts against the second limiting member, the third stop member abuts against the first limiting member.

7. The tunable earphone according to claim 1, wherein: The inner side of the shell is provided with a dustproof net, and the dustproof net covers the tuning hole.

8. The tunable earphone according to claim 1, wherein: The outer side of the shell further has a first positioning mark, which is located on one side of the first connecting part. The outer side of the rod body has a second positioning mark, which is located on one side of the second connecting part. When the second connecting part rotates relative to the first connecting part, the second positioning mark corresponds to the first positioning mark.

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