Headphones

Abstract

The application discloses a headphone, which comprises an ear shell, a loudspeaker unit, a loudspeaker support and a cover body, the ear shell is provided with first air holes and second air holes which are arranged at intervals along the front-rear direction of the ear shell; the loudspeaker support is arranged in the ear shell, the loudspeaker support has a receiving cavity and a sound outlet hole which is communicated with the receiving cavity; and the loudspeaker support and the ear shell cooperatively form a front chamber which is located at the front side of the loudspeaker support, the front chamber is communicated with the first air holes, the loudspeaker unit is arranged in the receiving cavity and divides the receiving cavity into a front sound cavity and a rear sound cavity, the front sound cavity is communicated with the front chamber, and the rear sound cavity is communicated with the second air holes; the cover body is provided with first communication holes and second communication holes and is movably arranged on the ear shell; the first communication holes are communicated with the first air holes, and the second communication holes are communicated with the second air holes. The application can improve the defects of the existing headphone, such as sound leakage and influence on low-frequency response effect when the headphone is worn in a transparent mode.

Description

Technical Field

[0001] This application relates to the field of headphone technology, and particularly to a headphone. Background Technology

[0002] Over-ear headphones fit snugly against the user's scalp during wear, creating a sealed cavity around the ears for effective noise cancellation. However, prolonged wear can lead to stuffiness due to poor air circulation, and may also make it difficult to perceive external sounds in certain situations.

[0003] In some designs, over-ear headphones incorporate a connecting hole between the outside world and the front chamber to enhance comfort during extended wear and enable a transparent mode, allowing users to hear external sounds.

[0004] However, the above-mentioned design also makes the connecting hole prone to sound leakage during wear. Utility Model Content

[0005] This application provides a pair of headphones and headphones that can improve the sound leakage problem of existing headphones that can achieve transparency mode.

[0006] This application provides a headset comprising an ear shell, a speaker unit, a speaker bracket, and a cover. The ear shell has a first vent and a second vent, which are spaced apart along the front-rear direction of the ear shell. The speaker bracket is disposed within the ear shell, having a receiving cavity and a sound outlet communicating with the receiving cavity. The speaker bracket and the ear shell cooperate to form a front chamber located at the front of the speaker bracket, which communicates with the first vent. The speaker unit is disposed within the receiving cavity, dividing the receiving cavity into a front sound chamber and a rear sound chamber. The front sound chamber communicates with the front chamber, and the rear sound chamber communicates with the second vent. The cover has a first connecting hole and a second connecting hole and is movably disposed on the ear shell. The cover can move relative to the ear shell and switch between a first state and a second state. In the first state, the first connecting hole connects to the first vent, and the second connecting hole connects to the second vent. In the second state, the cover closes the first vent and the second vent.

[0007] Based on the above embodiments, the headphones proposed in this application have a cover movably disposed on the ear shell, and the ear shell is respectively provided with a first vent hole connecting the front acoustic cavity and a second vent hole connecting the rear acoustic cavity. The cover is correspondingly configured with a first connecting hole and a second connecting hole. In the second state, neither the first connecting hole nor the second connecting hole is connected to the first vent hole or the second vent hole, so the headphones can achieve a better noise reduction effect. In the first state, since the first connecting hole is connected to the first vent hole and the second connecting hole is connected to the second vent hole, the headphones are connected to the front cavity of the user's ear and the outside world, so a transparent mode can be achieved. This not only achieves better breathability and effectively alleviates the stuffiness of wearing for a long time, but also allows external sounds to be transmitted to the user's ear through the propagation path of the first connecting hole and the first vent hole, so that the user can perceive the external sounds.

[0008] Furthermore, this application connects the front acoustic cavity to the first vent hole via the sound outlet and the front chamber, and the rear acoustic cavity is also connected to the second vent hole. In the transparent mode, the sound emitted by the speaker unit of the headphones from the first vent hole and the second vent hole can interfere and cancel each other out, thereby improving the sound leakage problem of the headphones in the transparent mode.

[0009] Meanwhile, since both the front and rear acoustic chambers of this application are connected to the outside world in the first state, the air pressure of the front and rear acoustic chambers can be adaptively adjusted during the operation of the speaker unit, thereby effectively improving the sound quality performance of the headphones in different frequency bands and bringing users a better audio experience. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0011] Figure 1 This is a three-dimensional structural diagram of an embodiment of the over-ear headphone unit in the over-ear headphones of this utility model; Figure 2 for Figure 1 A three-dimensional structural diagram of the headphone unit from another perspective; Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the headphone unit in the image; Figure 4 for Figure 1 Another cross-sectional structural diagram of the headphone unit in the image; Figure 5 for Figure 1 A schematic diagram of the assembly of the ear shell and speaker bracket in a headset unit; Figure 6 for Figure 1 A schematic diagram of the structure of the cover in the headphone unit; Figure 7 for Figure 3 Enlarged view of point A in the image.

[0012] Explanation of icon numbers: 100. Headphone unit; 10. Ear shell; 11. Front shell; 12. Rear shell; 13. First vent; 14. Second vent; 15. Front chamber; 16. Rear chamber; 20. Speaker bracket; 21. Speaker mount; 211. Sound outlet; 212. Receiving groove; 213. Sound guide channel; 22. Speaker cover; 20a. Receiving cavity; 23. Second guide tube; 231. Pressure relief channel; 30. Ear cover; 40. Cover; 41. First connecting hole; 42. Second connecting hole; 50. Guide structure; 51. Annular guide groove; 52. Annular rib; 60. Rear cavity mesh.

[0013] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0015] Where the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0016] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0018] This application discloses a headset, including a headband and two headset units respectively disposed at both ends of the headband. The headband adopts an adjustable structure. The frame of the headband can be made of high-strength and lightweight alloy material, and its outer layer is wrapped with skin-friendly and breathable memory foam material and covered with soft protein leather fabric. It can not only effectively distribute ear pressure, but also adapt to different head sizes through telescopic buckles.

[0019] It should be noted that the headphone unit located at the end of the headband can be fixedly connected to the headband, or the headphone unit and the headband can be connected by rotation, sliding or detachment. This application does not limit the specific connection method and type between the headphone unit and the headband.

[0020] Once the headphones are worn on the user's head, the headband hangs on top of the head to provide support and prevent the headphones from slipping off. Simultaneously, the two headphone units fit snugly against the user's left and right ears respectively. Each headphone unit contains a speaker driver, which can be a dynamic driver, balanced armature driver, etc. Upon receiving an electrical signal, the speaker generates simple harmonic vibrations at the required frequency, causing surrounding air particles to undergo forced vibrations at the same frequency, thus producing sound waves.

[0021] Over-ear headphones fit snugly against the user's scalp during wear, creating a sealed cavity around the ears for effective noise cancellation. However, prolonged wear can lead to stuffiness due to poor air circulation, and may also make it difficult to perceive external sounds in certain situations.

[0022] In some designs, over-ear headphones incorporate a connecting hole between the external environment and the front chamber to enhance comfort during extended wear and enable a transparency mode, allowing users to hear ambient sounds. However, this connecting hole can also lead to sound leakage during use.

[0023] To address the aforementioned technical problems, this technical solution proposes a headset 100, which can be referred to for further details. Figures 1 to 3 , Figures 1 to 3Shown is a headphone unit of a headphone 100. In one embodiment, each headphone unit includes an ear shell 10, a speaker bracket 20, a speaker unit (not shown), and a cover 40.

[0024] The ear shell 10 can be made of high-strength and lightweight plastic material, such as a composite material of polystyrene and polyvinyl chloride. This material has good plasticity, is easy to process and mold, and has a certain strength to ensure the structural stability of the ear shell 10 during long-term use, effectively resisting external impacts during daily use without being easily damaged. In one embodiment, the ear shell 10 includes a front shell 11 and a rear shell 12, which are closed to form a mounting cavity (not shown). Through the two-part structural design of the ear shell 10, the internal components of the headphone unit can be assembled relatively easily.

[0025] The speaker bracket 20 is disposed inside the ear shell 10. The speaker bracket 20 has a receiving cavity 20a and a sound outlet 211 communicating with the receiving cavity 20a. The speaker unit is disposed inside the receiving cavity 20a and divides the receiving cavity 20a into a front sound cavity and a rear sound cavity. Since the speaker unit is not shown in the figure, the front sound cavity and the rear sound cavity are not specifically marked in the figure. It can be understood that the front sound cavity refers to the cavity located in front of the speaker unit. The sound is generated in the front sound cavity and propagates outward through the sound outlet 211. The rear sound cavity refers to the cavity located behind the speaker unit. The side of the diaphragm of the speaker unit is the front side.

[0026] To facilitate the assembly of the speaker unit, the speaker bracket 20 includes two parts: a speaker base 21 and a speaker cover 22. The speaker base 21 and the speaker cover 22 can be made of the same material or different materials, such as both being made of plastic or metal, or one being made of plastic and the other of metal. The aforementioned sound outlet 211 is provided on the speaker base 21. Specifically, a receiving groove 212 can be formed on the speaker base 21, and the sound outlet 211 communicates with the receiving groove 212. After the speaker cover 22 is closed on the speaker base 21 to seal the receiving groove 212, a receiving cavity 20a is formed. The speaker base 21 is connected to the front shell 11, and the speaker unit is connected to the speaker base 21. The diaphragm of the speaker unit and the speaker base 21 form a front sound cavity, and the speaker frame of the speaker unit and the speaker cover 22 form a rear sound cavity. The advantage of housing the speaker unit in the receiving cavity 20a is that the speaker unit and the speaker bracket 20 can be configured as a module and installed into the ear shell 10 in a modular assembly form.

[0027] Please refer to the reference. Figure 3 and Figure 4After the speaker bracket 20 is assembled into the ear shell 10, the ear shell 10 and the speaker bracket 20 together form a front chamber 15 and a rear chamber 16. The front chamber 15 is equipped with an opening to form an open structure, and the front acoustic chamber is connected to the front chamber 15 through the sound outlet 211. Understandably, the headphones also include components such as batteries and electronic control boards, which can be located in the rear chamber 16.

[0028] In one embodiment, the headphone unit 100 may further include an earcup 30. The earcup 30 may be connected to the ear shell 10 or the speaker bracket 20 and is arranged around the periphery of the front chamber 15. The earcup 30 is used to contact the scalp skin around the user's ear during the wearing of the headphone, so as to cooperate with the user's scalp skin to form a relatively sealed space that communicates with the front chamber 15. In this way, under normal use of the headphone, it can better isolate external noise.

[0029] like Figure 5 As shown, a first vent 13 and a second vent 14 are provided around the ear shell 10. The first vent 13 and the second vent 14 are arranged at intervals along the front-back direction of the ear shell 10. That is, the first vent 13 is located on the ear shell 10 near the front acoustic cavity / front chamber 15. The front acoustic cavity is connected to the first vent 13 through the sound outlet 211 and the front chamber 15. The second vent 14 is connected to the rear acoustic cavity.

[0030] Please refer to the reference. Figures 1 to 6 In one embodiment, the cover 40 is provided with a first connecting hole 41 and a second connecting hole 42. The cover 40 is movably disposed on the ear shell 10, wherein the cover 40 is movably disposed on the aforementioned front shell 11. The cover 40 can move relative to the ear shell 10 and switch between a first state and a second state. In the first state, the first connecting hole 41 is connected to the first vent hole 13, and the second connecting hole 42 is connected to the second vent hole 14. In the second state, the cover 40 closes the first vent hole 13 and the second vent hole 14.

[0031] When the cover 40 of this application is in its first state under user operation, both the front and rear acoustic chambers are connected to the outside. This effectively regulates the air pressure inside the front acoustic chamber and the front cavity 15, ensuring sound waves are transmitted to the ear canal while preventing abnormal sound pressure accumulation caused by a sealed environment, maintaining the stability of sound wave transmission, and making the sound more stable and natural. The second vent 14 is located on one side of the rear acoustic chamber and connects to it. Together with the buffering effect of the rear acoustic chamber on the vibration of the speaker unit, it further optimizes the vibration freedom of the speaker unit, allowing excess air pressure generated during the vibration of the speaker unit to be released in time, thereby reducing the damping effect of air pressure on vibration and ensuring that the speaker unit can more fully convert and propagate low-frequency sound waves. In this way, the independent first vent 13 and second vent 14 will significantly improve the acoustic performance of the headphones in different frequency bands, meeting the user's needs for high-quality audio output in multiple scenarios.

[0032] As can be seen, when the cover 40 of the headphones provided in this application is in the first state, air can circulate between the user's ear and the outside world through the first connecting hole 41, the first vent hole 13, the front acoustic cavity, the second connecting hole 42, the second vent hole 14, and the rear acoustic cavity, thereby achieving air exchange between the headphones 100 and the outside world, enhancing breathability during wear, reducing the accumulation of heat and moisture in the ear after prolonged wear, and effectively alleviating stuffiness. At the same time, external sounds can be transmitted to the user's ear in sequence through the first connecting hole 41, the first vent hole 13, and the sound outlet 211, allowing the user to perceive external sounds and achieving transparent mode wear. In transparent mode, when the speaker unit vibrates within the housing cavity 20a, it will radiate sound to the front acoustic cavity and the rear acoustic cavity respectively. Among them, the sound in the front acoustic cavity will be transmitted to the outside world through the sound outlet 211, the first vent hole 13, and the first connecting hole 41, and the sound in the rear acoustic cavity will be transmitted to the outside world through the second vent hole 14 and the second connecting hole 42. Since the first vent 13 and the second vent 14 are arranged at intervals along the front and back direction of the ear shell 10, and the front sound cavity and the rear sound cavity are separated by the speaker unit, and the sound transmitted from the first vent 13 and the second vent 14 are out of phase, when the two sounds meet in the external space, some of the sound waves of the two sounds will cancel each other out due to their out of phase, that is, interference cancellation will occur, thereby reducing the amount of sound leaked from the headphones 100 to the outside world and improving the sound leakage problem in the transparency mode.

[0033] Understandably, when the cover 40 is in the second state, the cover 40 seals the first vent 13 and the second vent 14 on the ear shell 10. At this time, the front acoustic cavity connected to the first vent 13 and the rear acoustic cavity connected to the second vent 14 are both isolated from the outside. This prevents the front and rear acoustic cavities from exchanging air and sound with the outside environment. Noise from the external environment is difficult to enter the headphone 100 through the vents and be transmitted to the user's ear. At the same time, the sound generated by the vibration of the speaker unit in the housing cavity 20a is also not easily leaked to the outside through the first vent 13 and the second vent 14, reducing the entry of external noise and the leakage of internal sound. Therefore, the headphone 100 can achieve a better noise reduction effect.

[0034] It should be noted that, for details, please refer to [the relevant documentation / reference]. Figure 5 and Figure 6 As shown, the specific structures of the first vent 13, the second vent 14, the first connecting hole 41, and the second connecting hole 42 can be adaptively adjusted according to actual acoustic performance requirements and manufacturing processes. The structural forms of the first vent 13, the second vent 14, the first connecting hole 41, and the second connecting hole 42 can be either single through holes or a multi-hole array ventilation structure composed of multiple through holes evenly distributed. The geometry, aperture size, and array arrangement parameters of the through holes are design variables that can be flexibly selected by those skilled in the art based on specific application scenarios; this application does not impose a unique limitation on their specific structures and parameter settings.

[0035] For example, the first connecting hole 41 can be in the form of a mesh or covered with a mesh or metal mesh to construct the aforementioned porous array ventilation structure. And / or, the second connecting hole 42 can also be in the form of a mesh or covered with a mesh or metal mesh to construct the aforementioned porous array ventilation structure.

[0036] The cover 40 of this application is movably disposed on the ear shell 10, wherein the cover 40 can be disposed outside the ear shell and can slide relative to the outer wall surface of the ear shell 10 to switch between a first state and a second state.

[0037] In one embodiment, please refer to Figures 3 to 6The cover 40 is cylindrical and fits over the ear shell 10. The cover 40 can rotate around the ear shell 10, switching between a first state and a second state by deflecting around the central axis of the ear shell 10. When the cover 40 is deflected to the first state, the first connecting hole 41 is connected to the first vent hole 13, and the second connecting hole 42 is connected to the second vent hole 14, allowing gas exchange between the receiving cavity 20a and the front chamber 15 and the external environment, quickly balancing the air pressure inside and outside the headphone 100. When the cover 40 is rotated to the second state, the inner wall of the cover 40 completely covers the first vent hole 13 and the second vent hole 14, blocking the connection between the receiving cavity 20a and the front chamber 15 and the outside. Understandably, with the cover 40 located outside the ear shell 10, by setting the connecting hole as a mesh or covering it with a mesh or metal mesh, foreign objects can be effectively prevented from entering the inside of the headphones during the transparent mode of wearing the headphones.

[0038] In this application, multiple first vent holes 13 are configured, evenly distributed around the central axis of the ear shell 10 and along its circumference. Each first vent hole 13 connects to the front acoustic cavity. Multiple first connecting holes 41 are provided on the cover 40, the number of which corresponds to the number of first vent holes 13, allowing each first connecting hole 41 to connect to its corresponding first vent hole 13. In practical applications, the number of first vent holes 13 and first connecting holes 41 can be flexibly adjusted according to acoustic performance requirements. For example, preferably, four first vent holes 13 and four first connecting holes 41 are configured, evenly spaced at 90° intervals around the central axis of the ear shell 10. This allows for uniform air pressure regulation in all directions of the front acoustic cavity, improves rapid air pressure balancing capability, simplifies structural design and assembly processes, and reduces production costs. For example, three first vent holes 13 and first connecting holes 41 can be used, evenly distributed at 120° intervals around the central axis of the ear shell 10; or, alternatively, two first vent holes 13 and first connecting holes 41 can be configured, symmetrically arranged about the central axis of the ear shell 10. It should be noted that the number of first vent holes 13 and first connecting holes 41 is not limited to the above examples. Those skilled in the art can configure the number to five, six, or more according to specific acoustic parameter requirements, adjusting the number and distribution angle to meet the differentiated performance requirements of different models of headphones.

[0039] Similarly, this application provides multiple second vent holes 14, which are evenly distributed around the central axis of the ear shell 10 and along its circumference. Each second vent hole 14 connects to the rear acoustic cavity via a sound guide channel 213. The cover 40 is provided with multiple second connecting holes 42, the number of which corresponds to the number of second vent holes 14, ensuring that each second connecting hole 42 connects to its corresponding second vent hole 14. In practical applications, the number of second vent holes 14 and second connecting holes 42 can be flexibly adjusted according to acoustic performance requirements. For example, four second vent holes 14 and four second connecting holes 42 can be configured, forming a 90° equidistant distribution around the central axis of the ear shell 10. This allows for uniform air pressure regulation in all directions of the rear acoustic cavity, improves rapid air pressure balancing, simplifies structural design and assembly processes, and reduces production costs. For example, three second vent holes 14 and second connecting holes 42 can be used, evenly distributed at 120° intervals around the central axis of the ear shell 10; or, alternatively, two second vent holes 14 and second connecting holes 42 can be configured, symmetrically arranged about the central axis of the ear shell 10. It should be noted that the number of second vent holes 14 and second connecting holes 42 is not limited to the above examples. Those skilled in the art can configure the number to five, six, or more according to specific acoustic parameter requirements, adjusting the number and distribution angle to meet the differentiated performance requirements of different models of headphones.

[0040] Furthermore, in this application, the first vent 13 and the second vent 14, while arranged at intervals along the front-to-back direction of the ear shell 10, are also positioned directly opposite each other in the front-to-back direction. Thus, in the transparent mode, the dipole principle can be used to achieve acoustic short-circuiting, reducing external sound leakage. That is, when the sound waves generated by the vibration of the speaker unit propagate to the outside through the front and rear acoustic cavities via the corresponding vents and connecting holes, the sound waves emitted from the first and second connecting holes form a phase difference in space. Based on the interference characteristics of the dipole sound source, sound waves with opposite phases interfere and cancel each other out when they meet in external space. This not only ensures rapid and uniform balance of air pressure within the rear acoustic cavity, protecting the speaker unit's vibration freedom, but also significantly reduces the leakage of low-frequency sound waves from the rear acoustic cavity through the sound wave interference mechanism, reducing noise interference to the surrounding environment. In scenarios such as high-volume playback, this effectively improves the sound sealing of the headphones, avoiding sound leakage problems caused by rear acoustic cavity air pressure adjustment, and enhancing the privacy of the headphones in complex usage environments.

[0041] Please refer to Figures 5 to 7A guide structure 50 is also provided between the cover 40 and the ear shell 10. The guide structure 50 is configured to restrict the cover 40 to slide circumferentially along the ear shell 10. In one embodiment, the guide structure 50 includes a slidingly engaged annular rib 52 and an annular guide groove 51. Exemplarily, the annular rib 52 is disposed on the outer wall surface of the ear shell 10 and extends circumferentially along the ear shell 10. The annular guide groove 51 is correspondingly disposed on the inner wall surface of the cover 40. The shape and size of the annular guide groove 51 match the shape and size of the annular rib 52. The annular guide groove 51 is disposed on the inner side of the cover 40 and extends circumferentially along the cover 40. The annular rib 52 is inserted into the annular guide groove 51 and slidably connected to the annular guide groove 51. Of course, in other embodiments, the annular rib 52 may also be disposed on the inner wall surface of the cover 40 and extend circumferentially along the cover 40, and the annular guide groove 51 may be disposed on the outer wall surface of the ear shell 10 and extend circumferentially along the ear shell 10. Through the insertion and nesting of the annular rib 52 and the annular guide groove 51, not only is the radial displacement and axial movement of the cover 40 restricted during the deflection process, ensuring that the cover 40 rotates smoothly along a predetermined trajectory, but also reliable assembly positioning is provided.

[0042] Furthermore, multiple sets of the aforementioned guide structures 50 are provided to enhance the assembly stability between the cover 40 and the ear shell 10. Specifically, at least one set of guide structures 50 is located between the first vent hole 13 and the second vent hole 14; or, at least one set of guide structures 50 is located on the side of the first vent hole 13 away from the second vent hole 14, and at least one set of guide structures 50 is located on the side of the second vent hole 14 away from the first vent hole 13. Of course, a combination of the above two distribution forms can also be used.

[0043] By setting multiple sets of guide structures 50, it is ensured that the cover 40 remains coaxial with the ear shell 10 during rotation, preventing misalignment between the first connecting hole 41, the second connecting hole 42, the first vent hole 13, and the second vent hole 14 due to cover 40 offset. This ensures the conductivity of each hole in the first state and ensures that the inner wall of the cover 40 can better cover the vent holes in the second state. In addition, this distribution method can also enhance the overall rigidity of the connection between the cover 40 and the ear shell 10, reduce shaking or abnormal noise during rotation adjustment, improve the user's operating experience, and disperse the weight of the cover 40 itself and the impact force generated by external contact through multi-point support, reducing the structural wear rate and extending the service life of the guide structure.

[0044] In addition to the aforementioned method of using annular ribs 52 and annular guide grooves 51 in combination, in some other embodiments, the guide structure 50 includes sliding rail protrusions and grooves that are slidably engaged. Multiple sliding rail protrusions are provided on the outer wall of the ear shell 10, spaced apart circumferentially along the ear shell 10. Correspondingly, a groove is provided on the inner wall of the cover 40. The sliding rail protrusions are inserted into and slidably connected to the groove, allowing the cover 40 to reciprocate linearly along the axial direction of the acoustic chamber. When the cover 40 slides to the first state, the first vent 13 connects to the first connecting hole 41, and the second vent 14 connects to the second connecting hole 42, enabling air pressure communication between the receiving cavity 20a and the front chamber 15 and the external environment. When the cover 40 slides to the second state, the inner wall of the cover 40 blocks the first connecting hole 41 and the second connecting hole 42, preventing communication between the receiving cavity 20a and the front chamber 15 and the outside environment.

[0045] Of course, in other embodiments, the guide structure 50 may also be a sliding fit between a sleeve and a guide rod, or a fit between a ball and a groove, etc., and this application does not limit it in this regard.

[0046] The above description describes some feasible embodiments in which the cover 40 is rotatably disposed outside the ear shell 10. It is understood that the movement of the cover 40 relative to the ear shell 10 can be either circumferential rotation along the ear shell or axial sliding along the ear shell 10, thereby switching between the two states. In this mode of movement, the guide structure 50 can also be configured as described above, in which case both the annular rib 52 and the annular guide groove 51 will be straight lines.

[0047] In addition to being located on the outside of the ear shell 10, in other structural forms, the cover 40 can also be slidably located on the inner wall of the ear shell 10. Of course, in this case, part of the cover 40 can also extend out of the ear shell 10 for the user to operate.

[0048] It should also be noted that, in addition to being a cylindrical structure, the cover 40 can also be an arc-shaped shell, such as having a semi-circular, one-third, or one-quarter circular cross-section. This application does not impose any restrictions on this.

[0049] Please refer to Figure 4In one embodiment, the speaker base 21 and the speaker cover 22 enclose each other to form a sound guiding channel 213. The speaker base 21 may include a connected base body and an edge portion. The edge portion is connected to the periphery of the base body and extends outward from the base body. The base body has a receiving groove 212 for mounting the speaker unit. The edge portion is connected to the ear shell 10 and has a guide groove that connects to the receiving groove 212. The speaker cover 22 covers the base body and the edge portion, thereby enclosing the base body to form a receiving cavity 20a and a sound guiding channel 213, respectively. In this embodiment, the speaker cover 22 and the speaker base 21 cooperate to form the sound guiding channel 213, which simplifies the overall structure.

[0050] In other embodiments, a first conduit may be included, connecting the speaker base 21 and the ear shell 10. In this case, the speaker base 21 essentially consists only of the base body described in the above embodiment. A sound guiding channel 213 is formed within the first conduit. As mentioned above, multiple second vent holes 14 can be configured, and the number of first conduits also corresponds to the number of second vent holes 14. This embodiment, by using a first conduit to connect to the second vent holes 14 on the ear shell 10, achieves a good sealed connection with the second vent holes 14 while maintaining a relatively compact speaker bracket 20 structure.

[0051] In one embodiment, the speaker bracket 20 further includes a second conduit 23, which connects the first conduit 212 and the ear shell 10. A pressure relief channel 231 is formed within the second conduit 23, connecting the sound guide channel 213 to the outside. Alternatively, the second conduit 23 connects the speaker cover 22 and the ear shell 10, with the pressure relief channel 231 connecting the rear sound cavity to the outside. It is understood that when the second conduit 23 is provided, the ear shell 10 has a through hole corresponding to the pressure relief channel 231 within the second conduit 23, and the extension direction of the second conduit 23 is preferably aligned with the axial direction of the ear shell 10. It should be noted that the second conduit 23 can be a straight or curved tube, and its cross-sectional dimensions can be adjusted according to the gas flow requirements.

[0052] During the operation of the headphones 100, when the cover 40 is rotated to the second state, external air can enter the rear acoustic chamber through the second conduit 23. This not only balances the air pressure between the rear acoustic chamber and the outside, ensuring that the speaker unit can vibrate freely and stably in the second state, avoiding vibration distortion caused by air pressure imbalance, but also uses the inner wall of the second conduit 23 to buffer and reduce the noise of the external airflow entering the second conduit 23, reducing the possibility of external environmental noise entering the headphones.

[0053] To prevent external dust and impurities from entering the headphones 100 through the through-hole and interfering with the operation of acoustic components (including speaker drivers), while also ensuring air pressure regulation and sound wave transmission, a protective structure with both ventilation and filtering functions is required at the through-hole. Preferably, a rear cavity mesh 60 is provided at the through-hole. The rear cavity mesh 60 is made of high-density polyester fiber material using a special weaving process. This ensures that gas molecules can pass through smoothly to achieve air pressure balance, while effectively blocking dust particles, fiber impurities, etc., from entering the second duct 23 or the rear acoustic cavity.

[0054] Furthermore, from an acoustic perspective, the rear cavity mesh 60 does not excessively obstruct the airflow through the through-hole, ensuring that the air pressure balance efficiency is not affected. At the same time, the rear cavity mesh 60 is soft and has a certain degree of elasticity, which can slightly dampen high-frequency noise during sound wave transmission, helping to reduce the intensity of external high-frequency interference entering the rear acoustic cavity, providing a reliable protective foundation for the headphones 100 to stably perform low-frequency enhancement and air pressure regulation functions.

[0055] The above is an explanation of the over-ear headphones 100 proposed in the embodiments of this application. Since the over-ear headphones proposed in the embodiments of this application adopt all the technical solutions of all the above embodiments, they have at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be repeated here.

[0056] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0057] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A type of over-ear headphone, characterized in that, include: The ear shell has a first vent hole and a second vent hole on its periphery, and the first vent hole and the second vent hole are arranged at intervals along the front-back direction of the ear shell. A speaker bracket is disposed inside the ear shell. The speaker bracket has a receiving cavity and a sound outlet communicating with the receiving cavity. The speaker bracket and the ear shell cooperate to form a front chamber located on the front side of the speaker bracket. The front chamber communicates with the first vent hole. A speaker unit is disposed within the receiving cavity, which divides the receiving cavity into a front sound cavity and a rear sound cavity. The front sound cavity communicates with the front chamber through the sound outlet, and the rear sound cavity communicates with the second vent. The cover has a first connecting hole and a second connecting hole, and is movably disposed on the ear shell. The cover can move relative to the ear shell and switch between a first state and a second state. In the first state, the first connecting hole is connected to the first vent hole, and the second connecting hole is connected to the second vent hole. In the second state, the cover closes the first vent hole and the second vent hole.

2. The headphones as described in claim 1, characterized in that, The cover is disposed outside the ear shell and can slide relative to the outer wall surface of the ear shell to switch between the first state and the second state.

3. The headphones as described in claim 2, characterized in that, The cover is cylindrical and fits over the outside of the ear shell. The cover can rotate circumferentially relative to the ear shell to switch between the first state and the second state.

4. The headphones as described in claim 3, characterized in that, The first vent hole is provided in multiple spaces along the circumference of the ear shell, and the second vent hole is provided in multiple spaces along the circumference of the ear shell.

5. The headphones as described in claim 3, characterized in that, The first connecting hole is in the form of a mesh; And / or, the second connecting hole is in the form of a mesh.

6. The headphones as described in claim 3, characterized in that, A guide structure is also provided between the cover and the ear shell, the guide structure being configured to restrict the cover to rotate circumferentially along the ear shell.

7. The headphones as described in claim 6, characterized in that, The guiding structure includes a slidingly fitted annular rib and an annular guide groove. The annular rib is located on one of the inner wall surface of the cover and the outer wall surface of the ear shell, and the annular guide groove is located on the other of the inner wall surface of the cover and the outer wall surface of the ear shell.

8. The headphones as described in any one of claims 1 to 7, characterized in that, The rear acoustic cavity is connected to the second vent hole through a sound guiding channel.

9. The headphones as described in claim 8, characterized in that, The speaker bracket includes a speaker base and a speaker cover, the speaker cover and the speaker base cooperate to form the receiving cavity; the speaker base is provided with the sound outlet hole, and the speaker base and the speaker cover together form the sound guiding channel.

10. The headphones as described in claim 8, characterized in that, It also includes a first conduit, the speaker bracket includes a speaker base and a speaker cover, the speaker cover and the speaker base cooperate to form the receiving cavity; the first conduit connects the speaker base and the ear shell, and the sound guiding channel is formed inside the first conduit.

11. The headphones as described in claim 8, characterized in that, The speaker bracket also includes a second conduit; the second conduit connects the speaker bracket and the ear shell, and a pressure relief channel is formed inside the second conduit, which connects the rear acoustic cavity or the sound guide channel to the outside.

Images