Earphone

Abstract

The utility model discloses an earphone, which comprises a shell, a loudspeaking piece and a phase inversion structure, and is characterized in that the shell is provided with a first sound outlet hole and a second sound outlet hole; the loudspeaking piece is installed in the shell and divides the internal space of the shell into a front cavity and a rear cavity, and the front cavity is communicated with the first sound outlet hole; the phase inversion structure is installed in the rear cavity, the phase inversion structure and the loudspeaker part are arranged at intervals to form a first channel, a second channel communicated with the first channel is formed in the phase inversion structure, the second channel is communicated with the second sound outlet hole, a through opening is formed between the first channel and the second channel for communication, and the first channel is communicated with the second sound outlet hole through the through opening. And the first channel and the second channel are combined to form a multi-section channel. Through the structural design of the sound cavity, the low-frequency effect of the sound cavity can be enhanced, and the problem that the low-frequency sound quality of the earphone is poor is solved.

Description

Technical Field

[0001] The present application relates to the technical field of headphones, and in particular to a headphone. Background Art

[0002] In recent years, with the continuous improvement of living standards, various electronic products have become increasingly integrated into people's daily lives, becoming an indispensable part of their work, study, and leisure activities. Headphones are a particularly important type of electronic product. Headphones are a conversion unit that converts electrical signals received from a media player into audible sound waves through a speaker. Due to their high portability and compact size, headphones are increasingly popular among consumers. At the same time, consumer demand for headphones is increasing, and consumer expectations and requirements for headphones are also constantly rising.

[0003] Among them, open-back headphones are gradually being accepted by the general public. Clip-on open-back headphones are popular among users due to their small size, comfortable wearing, and no ear blockage. However, due to their small size and volume limitations, only small-diameter speakers can be used. Small-diameter speakers have a small sound area, resulting in a serious lack of bass effect compared to in-ear or semi-in-ear headphones of the same caliber, and the ideal sound quality enjoyment cannot be achieved. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide an earphone that can enhance its low-frequency effect through the structural design of the sound cavity to solve the problem of poor low-frequency sound quality of the earphone.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] In one aspect, an earphone is provided, comprising: a housing having a first sound outlet and a second sound outlet;

[0007] a speaker installed inside the housing and dividing the interior space of the housing into a front cavity and a rear cavity, wherein the front cavity is connected to the first sound outlet;

[0008] The bass reflex structure is installed in the rear cavity, and the bottom surface of the bass reflex structure is spaced apart from part of the speaker to form a first channel. A second channel connected to the first channel is formed in the bass reflex structure, and the second channel is connected to the second sound outlet. A through opening is provided between the first channel and the second channel, so that the first channel and the second channel are combined to form a multi-section channel.

[0009] Furthermore, the inverted structure includes an inverted plate and a sealing plate. The inverted plate abuts against the rear end of the middle part of the speaker and is partially separated from the speaker to form the first channel surrounding the outer periphery of the middle part of the speaker. A through groove is provided on the rear side of the inverted plate. The sealing plate is installed on the rear side of the inverted plate and covers the through groove to form the second channel.

[0010] Furthermore, the through-port is provided at an end of the inverted plate away from the second sound outlet, and the through-port connects the first channel and the second channel.

[0011] Furthermore, a pressure relief port is provided at one end of the inverter plate away from the through port, the pressure relief port is connected to the first channel and the second channel, and the diameter of the pressure relief port is smaller than the diameter of the through port.

[0012] Furthermore, a battery is included, and the battery is installed above the sealing plate. A third channel is formed between the side wall of the battery and the inner wall of the shell, and the third channel is connected to the second channel and the second sound outlet.

[0013] Furthermore, the second channel includes a first segment and a second segment connected in sequence along the airflow direction, the first segment is connected to the through port, and the second segment is connected to the third channel, wherein the cross-section of the first segment is trapezoidal, the cross-section of the second segment is rectangular, and the upper base of the first segment is connected to the second segment.

[0014] Furthermore, the volume of the first channel is greater than the combined volume of the second channel and the third channel.

[0015] Furthermore, a plurality of air pressure holes are provided on the speaker, and the air pressure holes communicate with the interior of the speaker and the first channel.

[0016] Furthermore, the first sound outlet hole and the second sound outlet hole are located on the same side of the housing.

[0017] Furthermore, a sealing member is provided at the front end of the speaker.

[0018] Furthermore, an angle α is formed between the center line of the first sound outlet and the center axis of the speaker, so that when the earphone is worn on a human ear, the first sound outlet is always facing the ear canal.

[0019] Furthermore, the angle α is between 30° and 50°.

[0020] Furthermore, the angle α is 40°.

[0021] The beneficial effect of the present application is: by setting the bass reflex structure in the rear cavity, the first channel formed between the bass reflex structure and the speaker is combined with the second channel formed by the bass reflex structure itself to form a multi-section channel, which is beneficial to the delay of the reflection of the low-frequency sound wave in the rear cavity, so that the phase of the low-frequency sound wave coming out of the second sound outlet is closer to the phase of the low-frequency sound wave in the front cavity, thereby enhancing the low-frequency effect, and then improving the sound quality of the headphones and enhancing the user's comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present application is further described in detail below with reference to the accompanying drawings and examples.

[0023] Figure 1 A three-dimensional diagram of the earphones according to an embodiment of the present application;

[0024] Figure 2 A top view of the earphone according to an embodiment of the present application;

[0025] Figure 3 For this application Figure 2 Schematic diagram of the cross section at AA in the middle;

[0026] Figure 4 This is a schematic three-dimensional diagram of the assembly of the inverted structure and the speaker according to the embodiment of the present application;

[0027] Figure 5 This is a top view of the assembly of the inverted structure and the speaker according to the embodiment of the present application;

[0028] Figure 6 For this application Figure 5 Schematic diagram of the cross section at the middle BB;

[0029] Figure 7 A three-dimensional diagram of the inverter plate described in an embodiment of the present application;

[0030] Figure 8 This is a schematic diagram of the angle α described in an embodiment of the present application.

[0031] In the figure: 1. Shell; 101. First sound outlet; 102. Second sound outlet; 103. Front cavity; 2. Speaker; 201. Air pressure hole; 3. Inverted phase structure; 301. First channel; 302. Second channel; 303. Third channel; 304. Inverted phase plate; 305. Sealing plate; 306. Through port; 307. Pressure relief port; 3021. First segment; 3022. Second segment; 3041. Through slot; 4. Sealing element; 5. Battery; 6. Dust net; 7. First bracket; 8. Second bracket; 9. Magnet; 10. Circuit board; 11. Cover. DETAILED DESCRIPTION

[0032] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0033] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] When a speaker is operating, sound waves are generated on both the front and back sides of the speaker, and these two sound waves have opposite phases. When sound waves of opposite phases meet, they cancel each other out. If sound waves of the same phase meet, they add together, and the wavelength amplitude increases dramatically. This phenomenon is called "resonance" or "resonance." In the field of audio design, the overall bass effect of the speaker is enhanced by adding a bass reflex tube to the back chamber of the speaker. The bass reflex tube can shift the phase of the sound waves in the back chamber so that they are close to the phase of the sound waves in the front chamber. When the low-frequency sound waves in the front chamber meet the low-frequency sound waves in the back chamber, a bass enhancement effect is produced. The front chamber of the headphone is the front of the speaker, and the back chamber is the negative. Therefore, if the back chamber of the headphone is cleverly designed to form a bass reflex tube structure in acoustics, the sound waves in the front and back chambers can be aligned in phase and add together, which can also enhance the low-frequency effect of the headphone.

[0036] Based on the above principles, this embodiment provides a headset, such as Figure 1-Figure 7As shown, it includes: a shell 1, a speaker 2 and an inverted phase structure 3, the shell 1 is provided with a first sound outlet 101 and a second sound outlet 102; the speaker 2 is installed inside the shell 1, and divides the internal space of the shell 1 into a front cavity 103 and a rear cavity, the front cavity 103 is connected to the first sound outlet 101; the inverted phase structure 3 is installed in the rear cavity, the bottom surface of the inverted phase structure 3 is spaced apart from a part of the speaker 2 to form a first channel 301, a second channel 302 connected to the first channel 301 is formed in the inverted phase structure 3, the second channel 302 is connected to the second sound outlet 101, and a through opening 306 is provided between the first channel 301 and the second channel 302, so that the first channel 301 and the second channel 302 are combined to form a multi-section channel.

[0037] In the above scheme, when the earphones are working, the speaker 2 generates sound waves. These sound waves are emitted from the front cavity 103 and the rear cavity simultaneously, but with opposite phases. The sound waves in the front cavity 103 are emitted from the first sound outlet 101. However, due to the design of the multi-section channel, the sound waves in the rear cavity will change phase during propagation, so that the phase of the sound waves emitted from the second sound outlet 102 gradually approaches the phase of the sound waves emitted from the front cavity 103. When these two sound waves with the same phase meet in the external space, they will superimpose on each other, thereby significantly enhancing the bass effect of the earphones. Through the design of the multi-section channel, the earphones successfully adjust the phase of the sound waves in the front cavity 103 and the rear cavity to be close to the same, so that the sound waves can superimpose on each other when they meet in the external space, thereby significantly enhancing the bass effect. This is particularly important for earphones with small-caliber speakers because it effectively compensates for the lack of bass. The enhanced bass effect allows users to obtain a fuller and more shocking sound quality experience. Whether listening to music, watching movies or playing games, users can experience a more realistic and three-dimensional sound effect. Although the headset has significantly improved in sound quality, it still maintains a small size and comfortable wearing experience, allowing users to enjoy high-quality sound anytime, anywhere without worrying about the portability and comfort of the headset.

[0038] Furthermore, the inverted structure 3 includes an inverted plate 304 and a sealing plate 305. The inverted plate 304 abuts against the middle rear end of the speaker 2 and is partially separated from the speaker 2 to form the first channel 301 surrounding the middle periphery of the speaker 2. A through groove 3041 is provided on the rear side of the inverted plate 304. The sealing plate 305 is installed on the rear side of the inverted plate 304 and covers the through groove 3041 to form the second channel 302. The inverted structure 3 is composed of an inverted plate 304 and a sealing plate 305. The inverted plate 304 directly contacts the middle rear end of the speaker 2, forming a first channel 301 with the non-contacted portion of the speaker 2. This first channel 301 is the key path for sound waves to propagate from the rear cavity of the speaker 2 to the interior of the inverted structure 3. A through slot 3041 is provided on the rear side of the inverted plate 304, and the sealing plate 305 is installed on the rear side of the inverted plate 304 and tightly covers the through slot 3041, thereby forming a second channel 302. This second channel 302 is connected to the second sound outlet 102 on the housing 1. Specifically, Figure 6 As shown, the arrows in the figure indicate the main direction of sound wave propagation. When the speaker 2 is operating, the sound waves in the front cavity 103 propagate directly to the outside world through the first sound outlet 101, while the sound waves in the rear cavity enter the bass reflex structure 3 through the first channel 301. Inside the bass reflex structure 3, the sound waves are delayed and phase-adjusted by multiple channels before being emitted from the second sound outlet 102. At this point, the phase of the sound waves in the rear cavity is nearly aligned with the phase of the sound waves in the front cavity 103. When they meet in the external space, they superimpose on each other, significantly enhancing the low-frequency effect. In this solution, the second channel 302 formed between the bass reflex plate 304 and the sealing plate 305 acts as a passageway cavity, primarily to make the structural design closer to that of a bass reflex tube. Furthermore, the multiple channels formed by the combination of the first channel 301 and the second channel 302 facilitate the delay of the reflection of low-frequency sound waves in the rear cavity, making the phase of the low-frequency sound waves exiting the second sound outlet 102 nearly aligned with the phase of the low-frequency sound waves exiting the first sound outlet 101, thereby enhancing the low-frequency effect.

[0039] To ensure sufficient space for reflection and extension of sound waves in the rear cavity during transmission, a through-hole 306 is provided on the end of the inverted plate 304 facing away from the second sound outlet 102. The through-hole 306 connects the first channel 301 and the second channel 302. When the speaker 2 is operating, sound waves in the front cavity 103 propagate directly to the outside through the first sound outlet 101, while sound waves in the rear cavity enter the inverted structure 3 through the first channel 301. These sound waves undergo multiple reflections within the complex space formed between the inverted plate 304, the sealing plate 305, and the rear wall of the housing 1, and travel freely between the first channel 301 and the second channel 302 through the through-hole 306. This design not only increases the propagation distance of the sound waves, but also allows the sound waves to gradually adjust their phase during the multiple reflections until the phase of the sound waves emitted from the second sound outlet 102 is nearly identical to that of the sound waves in the front cavity 103. This innovative design brings significant beneficial effects: first, the low-frequency effect is further enhanced, and the full reflection and phase adjustment of the sound waves in the rear cavity make the low-frequency sound waves fuller and deeper; second, the overall sound quality is more balanced, and the mid- and high-frequency sound waves are also positively affected during the propagation process, presenting a more natural and harmonious sound quality performance; finally, the design flexibility is improved. By adjusting parameters such as port 306, the reflection and phase adjustment effects of the sound waves can be further optimized to meet the sound quality requirements of different users.

[0040] In the process of further optimizing the headphone design, special consideration was given to the high power characteristics and large diaphragm excitation of open-back headphone speakers. To address the significant increase in speaker diaphragm excitation when the proportion of low frequencies increases, and the resulting challenge of rapid air flow in the rear cavity, more refined adjustments were made to the inverted plate 304. Specifically, a pressure relief vent 307 is provided on the end of the inverted plate 304 facing away from the port 306 (i.e., closer to the second sound outlet 102). This pressure relief vent 307 not only connects the first channel 301 and the second channel 302, but its diameter is also intentionally smaller than that of the port 306. This design is intended to ensure effective regulation of air pressure balance in the rear cavity without affecting the normal vibration of the speaker diaphragm. When open-back headphones are operating, the large vibrations of the speaker diaphragm create a significant pressure differential in the rear chamber. If this pressure differential isn't balanced in a timely manner, it can affect the proper functioning of the speaker diaphragm and, in turn, the sound quality. Pressure relief vent 307 acts like a sensitive "pressure regulating valve," rapidly responding to changes in rear chamber pressure and discharging excess pressure differential, thereby maintaining a stable rear chamber pressure. Because pressure relief vent 307 is smaller in diameter than through port 306, it ensures sensitive pressure balance while preventing excessive sound wave energy from leaking directly into the external space through vent 307, thus ensuring the purity and clarity of the sound quality.

[0041] In some embodiments, a battery 5 is further included, and the battery 5 is mounted above the sealing plate 305. A third channel 303 is formed between the side wall of the battery 5 and the inner wall of the housing 1. The third channel 303 connects the second channel 302 and the second sound outlet 102. In this solution, the sound waves emitted from the rear cavity of the speaker pass through the first channel 301, the second channel 302, and the third channel 303 in sequence before being transmitted from the second sound outlet 102. The first channel 301, the second channel 302, and the third channel 303 can be roughly regarded as an S-shaped channel when combined, which is conducive to delaying the reflection of low-frequency sound waves in the rear cavity. In addition, the design of this S-shaped channel has a significant effect on the reflection and delay of low-frequency sound waves. After multiple reflections and refractions in the channel, the phase and amplitude of the sound waves will change accordingly. In particular, low-frequency sound waves, due to their longer wavelengths, are more likely to form standing waves and resonance in the channel, thereby being more fully amplified and delayed. Moreover, since the installation position of the battery 5 is located above the sealing plate 305, and the existence of the third channel 303 does not damage the sealing of the sealing plate 305, the sealing of the entire rear cavity is still well maintained, which helps to reduce the energy loss of sound waves during propagation and improve the transmission efficiency of sound waves.

[0042] Furthermore, the second channel 302 includes a first segment 3021 and a second segment 3022, which are connected in sequence along the airflow direction. The first segment 3021 is connected to the through-port 306, and the second segment 3022 is connected to the third channel 303. The first segment 3021 has a trapezoidal cross-section, and the second segment 3022 has a rectangular cross-section. The upper base of the first segment 3021 is connected to the second segment 3022. As the initial portion where sound waves enter the second channel 302, the design of the first segment 3021 is particularly critical. To optimize the flow and reflection of sound waves, the cross-section of the first segment 3021 is designed to be trapezoidal. This trapezoidal design allows sound waves to gradually diffuse upon entering the first segment 3021, reducing sound wave reflection and energy loss caused by sudden changes in cross-section. At the same time, the upper base of the trapezoid is connected to the subsequent second segment 3022, providing good conditions for a smooth transition of sound waves. The second segment 3022 is the part where the sound wave continues to propagate and prepares to enter the third channel 303. Its cross-section is designed to be rectangular. The rectangular cross-section is relatively regular, which is conducive to the straight-line propagation of the sound wave and reduces unnecessary scattering. In addition, the connection design between the second segment 3022 and the third channel 303 enables the sound wave to smoothly enter the next acoustic channel and continue its propagation path.

[0043] It is worth noting that the upper base of the first segment 3021 is directly connected to the second segment 3022. This seamless connection design avoids sound wave reflection and energy loss caused by cross-sectional changes. At the same time, it also ensures the continuity and stability of the sound wave during propagation.

[0044] At the same time, to further delay the reflection of low-frequency sound waves, the volume of the first channel 301 is larger than the combined volume of the second channel 302 and the third channel 303. Due to their longer wavelengths, low-frequency sound waves are more likely to form standing waves and resonate within larger volumes. By increasing the volume of the first channel 301, low-frequency sound waves have more space within the first channel 301 for reflection and interference, thereby enhancing the energy of the low-frequency sound waves and making the bass fuller and deeper. Furthermore, as the key part for sound waves entering subsequent channels, the increased volume of the first channel 301 allows the sound waves to travel a longer path and experience more reflections during propagation. This not only helps delay the reflection of low-frequency sound waves, but also makes the sound wave propagation path more complex and diverse, helping to reduce energy loss and distortion during sound wave propagation. In addition, in open-back headphones, the acoustic characteristics of the rear cavity have a crucial impact on the sound quality. By reasonably designing the volume ratio of the first channel 301, the second channel 302 and the third channel 303, the acoustic characteristics of the rear cavity can be made more in line with the design requirements. In particular, increasing the volume of the first channel 301 helps to balance the acoustic characteristics of the entire rear cavity, so that high-frequency, mid-frequency and low-frequency sound waves can be better coordinated and integrated during the propagation process.

[0045] Preferably, the speaker 2 is provided with a plurality of air pressure holes 201, which connect the interior of the speaker 2 with the first channel 301. When the diaphragm of the speaker 2 is operating, it simultaneously drives the air in front of and behind the diaphragm to form two sets of sound waves. These two sets of sound waves are 180 degrees out of phase, with their peaks and valleys facing each other, which partially offset each other's sound pressure. To maintain air pressure balance within the enclosure and prevent the adverse effects of internal and external pressure differences on the diaphragm, the design of the air pressure holes 201 allows for air exchange between the interior and the exterior, thereby maintaining stable air pressure. Furthermore, the speaker 2 generates heat during operation. If this heat cannot be dissipated promptly, it may degrade performance or even damage the speaker 2. The design of the air pressure holes 201 facilitates air circulation within the enclosure, promotes heat dissipation, and protects the speaker 2 from overheating.

[0046] Furthermore, the air pressure holes 201 in the rear cavity help prevent acoustic short-circuiting of low-frequency sounds. Acoustic short-circuiting occurs when low-frequency sound waves reflect and overlap within the speaker, resulting in sound distortion and reduced sound quality. Air pressure holes 201 allow low-frequency sound waves to be better radiated to the outside world, reducing the occurrence of acoustic short-circuiting and thus improving sound quality.

[0047] Generally speaking, the first sound outlet 101 and the second sound outlet 102 are located on the same side of the housing 1. The effects of this solution are mainly reflected in the following aspects:

[0048] Acoustic consistency: Placing the first and second sound outlets 101, 102 on the same side helps maintain acoustic consistency. After emanating from the speaker 2, sound waves are processed by the acoustic channels within the front and rear chambers, ultimately exiting through the first and second sound outlets 101, 102 on the same side. This reduces acoustic phase distortion and inconsistent frequency response caused by differences in sound wave propagation paths. Furthermore, the superposition of low-frequency sound waves in the rear chamber after phase inversion enhances low-frequency sound.

[0049] Sound directionality: For certain types of headphones, such as open or semi-open headphones, sound directionality is an important consideration. Placing the sound outlets on the same side ensures relatively uniform sound directionality, enhancing the sense of space and positioning.

[0050] Wearing comfort: From the perspective of wearing comfort, designing the sound holes on the same side can also avoid unnecessary pressure or discomfort on the ears. If the sound holes are distributed on different sides of the housing 1, it may increase the size and weight of the earphones, adversely affecting wearing comfort.

[0051] Aesthetics: From a design perspective, locating the sound vents on the same side also helps maintain the overall aesthetics of the headphones. As an integral part of the headphone's design, the placement and arrangement of the sound vents directly impacts the visual effect. Placing the vents on the same side creates a cleaner, more unified, and more harmonious appearance.

[0052] Furthermore, a seal 4 is provided at the front end of the speaker 2. The primary function of seal 4 is to ensure a relatively closed space at the front end of the speaker 2, which helps reduce energy loss and distortion during sound wave propagation. When the speaker 2 vibrates and generates sound waves, seal 4 prevents these waves from leaking directly into the rear cavity of the speaker 2 or other unintended spaces. This allows the sound waves to propagate more concentratedly and efficiently to the outside world. This not only enhances the loudness and clarity of the sound, but also improves the expressiveness of low-frequency sound waves, resulting in a fuller and deeper bass.

[0053] In some embodiments, it also includes two dust-proof nets 6, a first bracket 7, a second bracket 8, a magnet 9, a circuit board 10, a cover plate 11, etc. The two dust-proof nets 6 are respectively arranged in the first sound outlet 101 and the second sound outlet 102, mainly to play a dust-proof role to avoid blockage inside the sound outlet and affect the sound wave propagation effect. The first bracket 7 is used to support the speaker 2, the second bracket 8 is installed above the battery 5, and is used to install and support the circuit board 10. The cover plate 11 is covered on the circuit board 10, and the outer surface of the cover plate 11 can also be used as a decorative surface. The magnet 9 is installed in the front cavity 103 to play a role in positioning and adsorption with the earphone box.

[0054] It is worth noting that an angle α is formed between the center line of the first sound hole 101 and the central axis of the speaker 2, so that when the earphone is worn on the human ear, the first sound hole 101 is always facing the ear canal. In this solution, an angle α is formed between the center line of the first sound hole 101 and the central axis of the speaker 2. The purpose of this design is that when the earphone is worn on the user's ear, the angle α can ensure that the first sound hole 101 automatically adjusts to a position facing the ear canal, so that the sound emitted by the speaker 2 can be transmitted to the ear canal more directly and efficiently. This improvement not only significantly reduces the leakage of sound to the outside, avoiding possible interference to others when using earphones in public places, but also greatly improves the user's sound quality enjoyment. The user can feel clearer and fuller sound quality, as if immersed in the world of music.

[0055] Among them, the above-mentioned automatic adjustment of the first sound hole 101 to the position facing the user's ear canal does not mean that the relative position of the first sound hole 101 on the shell 1 is adjustable, but that after the earphone is worn on the ear, the first sound hole 101 is in a position facing the ear canal, that is, it is achieved by the angle α between the center line of the first sound hole 101 and the central axis of the speaker 2.

[0056] Optionally, the angle α is between 30° and 50°. This range was selected based on in-depth research into the shape of the human ear, wearing habits, and sound propagation characteristics. When the earphones are worn on the user's ears, the angle α ensures that the first sound outlet 101 is naturally oriented toward the ear canal, maintaining the optimal orientation toward the ear canal regardless of the shape of the user's ear or slight movement of the earphones during wear.

[0057] Preferably, the angle α is 40°. Extensive user research and wear testing revealed that when the angle α is set to 40°, the first sound outlet 101 of the earphone is precisely aligned with the user's ear canal. This design not only ensures that sound is transmitted directly and efficiently into the ear canal, reducing attenuation and distortion during sound transmission, but also minimizes sound leakage, avoiding potential interference to others when using the earphones in public.

[0058] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other positions or relationships are used solely for ease of description and simplified operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0059] Throughout this specification, references to terms such as "an embodiment" or "example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0060] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0061] The technical principles of the present application have been described above in conjunction with specific embodiments. These descriptions are intended solely to explain the principles of the present application and are not to be construed in any way as limiting the scope of protection of the present application. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present application without inventive effort, and such implementations will fall within the scope of protection of the present application.

Claims

1. A headset, characterized in that: include: The housing (1) is provided with a first sound outlet (101) and a second sound outlet (102); A speaker (2) is installed inside the housing (1) and divides the interior space of the housing (1) into a front cavity (103) and a rear cavity, wherein the front cavity (103) is connected to the first sound outlet (101); The inverted phase structure (3) is installed in the rear cavity, and the bottom surface of the inverted phase structure (3) is spaced apart from a portion of the speaker (2) to form a first channel (301). A second channel (302) communicating with the first channel (301) is formed in the inverted phase structure (3), and the second channel (302) is communicated with the second sound outlet (102). A through opening (306) is provided between the first channel (301) and the second channel (302), so that the first channel (301) and the second channel (302) are combined to form a multi-section channel.

2. The earphone according to claim 1, wherein The inverted structure (3) comprises an inverted plate (304) and a sealing plate (305); the inverted plate (304) abuts against the middle rear end of the speaker (2) and is partially separated from the speaker (2) to form the first channel (301) surrounding the middle periphery of the speaker (2); a through groove (3041) is provided on the rear side of the inverted plate (304); the sealing plate (305) is installed on the rear side of the inverted plate (304) and covers the through groove (3041) to form the second channel (302).

3. The earphone according to claim 2, wherein The through-port (306) is provided at one end of the inverted plate (304) away from the second sound outlet (102), and the through-port (306) connects the first channel (301) and the second channel (302).

4. The earphone according to claim 3, wherein A pressure relief port (307) is provided at one end of the inverted plate (304) away from the through port (306), the pressure relief port (307) being in communication with the first channel (301) and the second channel (302), and the diameter of the pressure relief port (307) is smaller than the diameter of the through port (306).

5. The earphone according to claim 3, wherein The invention also includes a battery (5), wherein the battery (5) is installed above the sealing plate (305), and a third channel (303) is formed between the side wall of the battery (5) and the inner wall of the shell (1), and the third channel (303) is connected to the second channel (302) and the second sound outlet (102).

6. The earphone according to claim 5, characterized in that The second channel (302) includes a first segment (3021) and a second segment (3022) connected in sequence along the airflow direction, the first segment (3021) is connected to the through port (306), and the second segment (3022) is connected to the third channel (303), wherein the cross section of the first segment (3021) is trapezoidal, the cross section of the second segment (3022) is rectangular, and the upper base of the first segment (3021) is connected to the second segment (3022).

7. The earphone according to claim 5, characterized in that The volume of the first channel (301) is greater than the sum of the volumes of the second channel (302) and the third channel (303).

8. The earphone according to any one of claims 1 to 7, characterized in that: The sound-speaker (2) is provided with a plurality of air pressure holes (201), and the air pressure holes (201) are connected to the interior of the sound-speaker (2) and the first channel (301).

9. The earphone according to any one of claims 1 to 7, characterized in that: The first sound outlet hole (101) and the second sound outlet hole (102) are located on the same side of the housing (1).

10. The earphone according to any one of claims 1 to 7, characterized in that: A sealing member (4) is provided at the front end of the speaker (2).

11. The earphone according to any one of claims 1 to 7, characterized in that: An angle α is formed between the center line of the first sound outlet (101) and the center axis of the speaker (2), so that when the earphone is worn on a human ear, the first sound outlet (101) always faces the ear canal.

12. The earphone according to claim 11, wherein The angle α is between 30° and 50°.

13. The earphone according to claim 11, wherein The angle α is 40°.

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